Cancer in a fish tank


Types and content of aquarium crayfish

Crayfish (lat. Astacidea) is an infra-series of decapod crustaceans (Decapoda). Freshwater crayfish accrue to more than 100 species, some of which have been cultivated in home aquariums. All aquarium crayfish require special maintenance conditions, with quality care, they will live 2-5 years or more.

The rules of the content in the decorative aquarium

The maintenance of crustaceans is possible in small tanks with fresh, prepared water. If you carry out regular water changes, then an aquarium with a volume of 40 liters per individual is sufficient. Crustaceans can hide their food, so install grottoes or caves in the nursery. Filtration of water and siphon of the bottom is necessary so that the remnants of the feed will not start to rot. Periodically check all shelters. Use the internal filter for the aquarium, on the outer crayfish can easily get out.

The maintenance of two or more crustaceans will require a larger tank with a capacity of 80-100 liters. The fact is that 1-2 times a year, aquarium crayfish molt, and if one congener catches the eye of another, they will eat the last one. Spacious aquarium with caches will protect everyone from cannibalism.

What is molt? Like all arthropods, crayfish molt. Their body is covered with a hard chitinous cover that is growing, and for the growth of the new, the old must be dropped. If the aquarium crustacean hides more often, it means that it is preparing for the process. After molting, he will eat his old shell, because there is still a lot of calcium in it to grow a new one. Fully cover will resume in a few days. Juveniles are subject to frequent molting, unlike mature ones.

Look at the feeding of Cuban crayfish.

In the natural habitat (and crayfish are found on almost all continents), they eat mostly plankton and plant food. Content in captivity involves feeding with special feeds for crustaceans, sinking granules and tablets. You can give vegetables - spinach, cucumbers, zucchini, lettuce, the remnants of aquarium plants. Also add to the diet protein foods, only 1 time per week: fish fillet and shrimp, live food in frozen form. Feeding - once a day in small portions. All crayfish are easily divorced in captivity, but the rules for each species are different.

The body size of the crustaceans also depends on the particular species. The largest freshwater cancer in the world is the Tasmanian giant cancer (50 cm in length, weight - 5 kg). Other species are small, reaching 12-20 cm in length.

Is it possible to settle in a common tank?

Is crayfish compatible with fish? Keeping with fish is difficult because either fish or crayfish can be eaten. The clamshell animal with its claws can have a bite in two of such small fish as guppies, molly, neons, corridors. Crayfish hunt at night, so in the morning you can not see your favorite pets. A species aquarium is an optimal security condition for all.

Also crustaceans do not get along well with fish of the Cichlid family. These are rather large fish, and the crustacean can easily break, during the molt they are attracted by the old shell. With shrimps, their distant relatives, crayfish also live poorly - small ones can easily be eaten.

All types of crayfish eat, uproot plants. Therefore, it is not recommended to keep them in aquariums with dense vegetation. Only one species - this is Mexican dwarf cancer, ignores the underwater flora. Crayfish are cold-loving animals, which are adversely affected by the warm water temperature, so the water parameters need to be adjusted in the water tank. Each type of cancer requires certain conditions of detention.

Varieties of beautiful aquarium crayfish

  1. Yabbi - body size can be up to 20 cm in length. This is an aggressive look, which is called a "destroyer." Body color is blue, lives 2-4 years in an aquarium. Natural habitat - Australia, loves muddy water and a slow current, a lot of thickets. Allowed content at a temperature of 20-26 ° C, with a change in the temperature range, may die. A female apple gives birth to 500-1000 small crustaceans.

    Observe the life of the apple cancer in the general aquarium.

  2. Florida Blue (Procambarus Alleni) has a brown shell color in nature, but a beautiful blue cancer was obtained by breeding. The natural habitat of brown is freshwater with a slow flow in the territory of Florida (USA). Body size is 8-10 cm in length. The female can produce 100-300 rachat, which grow very quickly.
  3. Australian red-fingered (red-flesh) cancer (lat. Cherax Quadricarinatus) - like many species, grows 14–20 cm in length. The color of the shell is variegated: bluish-green with yellow patches, the claws of the males have bright red stripes and growths in the form of thorns. In nature, lives in Australia, at the bottom of rivers and lakes. It feeds on small plankton and plants. Reproduction occurs with the participation of the female and male. The female crustacean produces 500-1500 calves, which are incubated in caviar for one and a half months.

  4. At first glance, the Louisiana dwarf crustacean (Latin Cambarellus Shufeldtii) looks simple in appearance. But if you look closely, you can see the reddish tint of the shell, which can be seen horizontal black stripes. Claw cancer has a small, long and smooth texture. It does not live long: a year or a year and a half, the life expectancy of males is longer than that of females. Dimensions of the form: 3-4 cm in length, so he is rather shy and shy, does not pose a danger if he lives with small fish in a common tank. Natural Habitat: Louisiana (USA). For one breeding, females bring caviar (30-40 pcs.), Bearing it for 3 weeks. This can happen twice a year.

  5. Blue Cuban crayfish (Latin Procambarus Cubensis) - one of the most common types of aquarium crayfish. Natural habitat - Cuba. The color of the shell is very bright - blue-blue, body length 10 cm. Hardy look, tolerates changes in the parameters of the aquatic environment. However, he eats aquatic plants, and his behavior with fish is quite aggressive.

Aquarium crayfish: content

In the previous article we talked about the roots of domesticated arthropods, looked at the features of their appearance, and ran through the most popular types of aquarium crayfish. So, let's continue the story. It will now be about how to create the most favorable conditions for their existence and avoid many diseases and other troubles.

Compatibility of crayfish with fish

At once we will say that this neighborhood often brings only problems. There are, of course, cases when crayfish coexist well with fish. But even more situations where one or the other side suffers as a result of such a tandem. For example:

  1. Soma are arthropods' competitors for food and shelter. Collisions on this ground are inevitable.
  2. Small fish like neons, guppies, etc. can be crayfish elementary eaten.
  3. Large fish with long tails and fins (gold, angelfish, etc.) can lose their wealth.
  4. In the vicinity of large, but aggressive fish like cichlids, crayfish are doomed to hunger and stress, and ultimately to death.
Thus, if you are not ready to take risks and experiment, keep the crayfish apart.

How to create conditions in the aquarium?

From the place of purchase to the place of residence of arthropods transported in a black opaque package. Adaptation is fast. It should be borne in mind that the temperature difference in the package and in an artificial reservoir should not be more than three degrees. The following conditions are considered optimal for cancers:

Aquarium. The minimum volume of the tank must be at least 15 liters per 6 cm specimen. However, given that close housing provokes crayfish to aggression, it is better to take a vessel as spacious as possible. From above, it is imperative to install a cover with small holes, as in case of overpopulation, the crayfish will be trying to get out of the aquarium when overcrowded, the water is dirty or oxygen-poor. If possible, the best option is to equip the aquaterrarium.

Water must be clean, rich in oxygen, with a temperature in the range of 17-21 degrees and a hardness of 8-12. To increase the stiffness in the ground, you can put marble or limestone. It is better to install an internal filter in order to stop attempts to escape by wires. Cancers love to hide the remnants of food, which then rot and spoil the water. In this connection, regular replacement of 50% of water is necessary.

Priming better to choose large. Crayfish dig holes, and not a single plant will take root in the shallow soil.

Vegetation. Algae is better to pick up with strong roots, large leaves and strong stems. Before planting, they should be held in quarantine.

Registration. Various stones, snags, hoses, halves of ceramic flower pots, grottoes, etc. can be used as decorations. From them crayfish build shelters for themselves and climb them to the surface of the water.

What to feed the crayfish?

It is better to do this in the evening hours, as the daytime crayfish hide. If arthropods coexist with fish, in the latter by the evening the activity decreases, and they will not drag feed from claw carriers from under the nose.

Despite the fact that aquarium arthropods are omnivorous, there are some nutritional recommendations for them. Over eighty percent of the daily ration of crayfish should be plant food. You can give elodey, nettle, water lily, rdest, algae, carrots, zucchini, spinach, parsley. For a variety of give various mollusks, insects, worms, tadpoles, frozen bloodworms, feed for bottom fish.

As a delicacy, you can sometimes treat fish to pieces or lean meat. Meat can be raw, boiled or in the form of stuffing own twist without store additives. Interestingly, crayfish prefer it in a slightly rotten condition. Protein food is given no more than once a week, since it has been observed that it increases aggressiveness.

Special feeds for crayfish and shrimp are also available, which can also be used (for example, such brands as Dennerle, Tetra, MOSURA, Genchem Biomax series). They strengthen the immune system, maintain the brightness of pet coloring. There are granules, plates, sticks.

As for the frequency of meals, there is no unity of views. In some sources, it is recommended to feed females once every three days, males - once every two days. Others advise for both sexes meals once a day. Therefore, here you can see for yourself the behavior of your pets and by trial and error will select your ideal schedule. During molting or crayfish breeding, the number of meals increases. Young individuals readily take ready food for fry, artemia, shredded tubule. In addition, they still eat organic decay products, thus cleaning the aquarium. To improve digestion and prevention of parasites, dried leaves of oak, alder and beech are given.

Crayfish breeding

The mating period in adults begins after the completion of molting. In females at this time there is a selection of pheromones, which attract the opposite sex, and the males go in search. It is very interesting to observe how the formed couple dances, sometimes for several hours, touching each other with their antennae. After that, the female is recommended to be planted in a separate container, where after 20 days she will lay eggs.

Relocation is necessary, as heightened anxiety and anxiety make her protect her offspring and show aggression towards everything around her. The eggs are attached by a sticky mass under the belly, and the female moves with them. Offspring fearfully and for a long time prefer to hold on to the torso of the mother. Eating crustaceans themselves begin only after the first molt. Shelters for young stock is a prerequisite to survive, hiding from offenders (including adult crayfish). After the second molt, the offspring gains sufficient autonomy, and the female is again resettled.

Crayfish disease

There are many, but here we consider only the most common.


This disease is very common in aquarium arthropods. The reason is the poor conditions in the aquarium. The simplest microorganisms settle on chitinous integuments, as a result of which the cancer looks covered with brown or grayish-white foam. If this plaque spreads to the gills, then the animal will not be able to breathe and will die. For recovery, it is necessary to put in order the water and the number of inhabitants in the aquarium. At the time of illness, the animal is quarantined.


Microscopic flatworm Temnocephalan worms that reach them through snails, Branchiobdella leeches and green algae living on the gills can plague the crayfish. You can get rid of them with regular salt baths and reducing the number of harmful neighbors.

Crab Disease

Recognize it only during the molting period. If the cancer shell does not harden for more than a day, then this is it. Causes: insufficient water hardness, poor nutrition and, as a result, lack of calcium. Treatment methods are obvious: create the right conditions for life and balance nutrition. As a preventive measure, you can use iodine drops for a marine aquarium, which are sold in pet stores. They drop half the dose.


It is an acute infectious disease. It is caused by the mushroom Aphanomices astaci. The disease is contagious and can kill all the inhabitants of the aquarium. Walking legs, armor and nervous system are affected. If a cancer has become infected, white, brown or red spots appear on its tail, and black spots on its shell. At the onset of the disease, disorientation occurs when walking, the lifestyle changes during the daytime. In the end - sluggish behavior, convulsions and death of the animal. There is no treatment as such. There are only recommendations to keep the newly acquired quarantined pet in water at 30 degrees with the addition of magnesium chloride or malachite green.

Rust-spotted disease

Also has an infectious nature. Pathogens - fungi of the family Mucedinaceae. Spots appear on the body of the cancer (orange, brown, black), then the shell in these places softens and the tissue dies out with the formation of ulcers. The end result will be the death of the animal. There is no cure. As in the previous case, the quarantine of a new cancer with the addition of leaves of oak, beech, and almond was recommended.

Porcelain disease

It affects the limbs, abdomen and oral apparatus. Cancer paralyzes and he dies. There is no cure. Patients are isolated.


Spores can get into an aquarium with inadequate and poorly treated soil and plants. Mushrooms affect integuments, gills, blood vessels and heart. Brown spots can be seen on the belly and gills. Reduced immunity, injuries, unfavorable conditions - all this places crayfish at risk.

Thus, crayfish can trap a lot of hazards. But mostly these are consequences of poor care. A responsible owner, they will long please their unusual appearance and interesting behavior.

Do crayfish live in an aquarium?

When the house has a large aquarium, there is a desire to populate it with all sorts of exotic inhabitants, so that it is beautiful and unusual. Many buy crayfish and settle them with fish. But is it possible to do that? Do two different kinds of inhabitants live together in the same container?

Almost all crayfish are peace-loving creatures. They do not create conflicts, sit quietly in the shelter during the day, and go out in the evening for food. They slowly move along the bottom of the aquarium, collecting prey. But sometimes the crayfish in the aquarium and fish - it is not compatible. There are many reasons for this.

Most importantly, small fish can easily eat cancer. Despite the fact that the fish move much faster, at night they sleep at the bottom of the aquarium. At this time, the hunt goes cancer and eats everything that is bad. He may not eat other inhabitants, but fairly cripple them, leaving without a beautiful tail. This applies to big fish. And sometimes it even causes serious wounds, after which the fish die.

The second reason for incompatibility is a possible famine. Pisces do not know the feeling of saturation and are able to eat everything that they will be given. Due to this slow, nocturnal crayfish may simply not get food. Having lived in hunger for several days, they will die.

This problem is quite easy to solve. You need to buy food that settles immediately to the bottom and pour it into the aquarium in the evening when the cancer comes out to eat.

Do crayfish live in an aquarium with other inhabitants? They live, but it is important to find him normal neighbors. Fish should be calm, not predatory, not very small. In this case, a favorable neighborhood is possible.

But, nevertheless, it is better to equip a separate terrarium for crayfish, where all conditions will be created for it. For example, they need a snag to get to the land. And the walls of aquariums must be high so that the crayfish cannot get out. Again, food. You can feed them with pieces of meat or fish. The remains of food quickly deteriorate and pollute the water. And often you can not replace the fish in the new liquid.

Wanting to get a crayfish, it is better not to risk the existing fish and not experiment with the health of a new tenant. Cohabitation can bring a lot of trouble to the owner and the cost of new fish. Therefore, it is better to equip another aquarium and then quietly enjoy the vital activity of healthy fish and crayfish.

Marble cancer: content in the aquarium, compatibility, reproduction, photo-video review


(Marblecrayfish, Procambarussp.)

This beautiful inhabitant of the aquarium world is an ornamental freshwater crayfish, which is characterized by its marble coloring. In addition, these arthropod inhabitants of the aquarium are same-sex - they have no males.

Motherland The marble crustacean is not known, but was first discovered by the Germans in Germany.

Growth this aquarium cancer occurs fairly quickly, after each shedding marble significantly increases in size. And ultimately reaches about 13-15 cm. In length.Further growth slows down

Color - based on the name, it is not difficult to guess that this cancer has a beautiful marble color. The overall color tone is variable: greenish, black, brown, and only a pattern on the body gives the cancer marble tones. Juveniles of this cancer are stained weakly, they are almost transparent, becoming an adult, the cancer acquires a juicy marble color.

Marble crustacean in form no different from ordinary crayfish - has five pairs of legs, and if you consider the mustache - then even more.

Photo structure of crustaceans

Comfortable aquarium for a marble crab it is considered a “pond” with a lot of shelters (grottoes, caves, stones, snags), where the latter likes to hide in the daytime. These crayfish lead a midnight life ... VERY IMPORTANT !!! So that each multi-fingered inhabitant of your aquarium has its own individual shelter. It should be noted that the size of the aquarium does not play a special role. The main thing is a personal home for everyone. It is also worth ensuring crayfish have access to the surface of the water, as they sometimes breathe air.

Requirements for water parameters for the maintenance of marble crayfish: a prerequisite for keeping crayfish is good aeration! Otherwise, these aquarium inhabitants are not whimsical. Comfortable water temperature for them is from 18 to 28 degrees. Water change should be done every two weeks.

Food for crayfish: eat any bottom food, dry, lively, etc. They are fed at night, due to their activity at this time.

Marble cancer compatibility with other inhabitants of the aquarium: these crayfish are friendly! However, in the neighbors are not recommended bottom fish (catfish), as well as slow fish (for example, Goldfish). This is due to the fact that conflicts can occur between them, as a result of which the fish will be "cut".

Molting process u is like all crustaceans. During the molting period, the crustaceans are defenseless, and therefore they do not leave the shelter for a long time. You should pay attention to the fact that it is impossible to remove the discarded shell from the aquarium, since the crayfish eat it up thereby replenishing the chitin supply.

Photos of marble cancer

Very interesting reproduction of marble crayfishThe fact is, these “comrades”, or rather “citizens”, do not have males. They multiply, the so-called parthenogenesis.

Puberty marble crayfish comes after several molts, when the color of their shell becomes bright. This occurs approximately in 2-3 months of life.

There are no special conditions for reproduction. Good feeding and maintenance - this is the key to successful breeding crayfish. The female without leaving the shelter, for about a month (the period of incubation of eggs), bears her eggs, gracefully ventilating her with her paws. After, fry are born, about 60-80 crustaceans, which can be planted after a month.

An interesting video of marble cancer

Marble crab keeping and breeding in an aquarium

Marble cancer is a unique creature that you can keep in an aquarium. Each of them can reproduce on its own, almost like plants propagate by seed without the participation of other plants. Each marble cancer is female, but they multiply by partogenesis, and can take the kids over and over again as two drops of water similar to their parents. The good news is that they are unpretentious in content and interesting in behavior.

Content in an aquarium

Marble cancer is medium in size, reaching 10-15 cm in length. Because of their small size, most aquarists try to keep marble crayfish in small aquariums. However, they create a lot of trash and dirt and it is better to plant the marble crayfish in the aquarium as spacious as possible. Especially if you want to contain not one or two, but more crayfish.

The minimum amount for the maintenance of marble cancer is 40 liters, and then it is quite difficult to care for such an aquarium. In different sources there are different wishes in terms of content for maintenance, but keep in mind that the larger the space, the larger and more beautiful the crayfish and the cleaner they are in the aquariums. Better that it was an aquarium of 80-100 liters.

It is better to use sand or small gravel as a soil, it is easier for crayfish to find food on such soil and clean after it is much easier. Be sure to add a variety of different shelters - caves, plastic pipes, pots, various snags, coconuts.

Since the marble crayfish are river creatures and at the same time quite a lot of trash, it is necessary to use a powerful filter, and create a stream in the aquarium. Additionally, it is better to use aeration, as crayfish are sensitive to the oxygen content in water. The optimum temperature is 18-28 C, pH - from 6.5 to 7.8.

Regular water changes in the aquarium are required, and you need to siphon the ground to remove rotting food residues. In this case, sand will come in handy, since the remnants do not penetrate into it, but remain on the surface.

As for plants, the only plants that can survive in an aquarium with marble crayfish are floating on the surface or in the water column. Everything else will be trimmed and eaten. You can try to put Javanese moss, they eat it less often, but still eat.

The aquarium should be carefully closed, especially if you use an external filter. Crayfish are very dexterous and easily run away in tubes from the aquarium, and then they die from drying out.


It is quite simple to feed the marble crayfish, as these are very unpretentious creatures who eat everything they can reach. Their main food is vegetable. You need to give both vegetable pills for catfish, various sinking granules and vegetables. Vegetables can be given corn, zucchini, cucumbers, spinach leaves, lettuce, dandelions. Before feeding the vegetables are scalded with boiling water.
Although marble crayfish mostly feed on plant food, they also need protein. You can feed them about once a week, fish fillets, shrimp meat, live food, snails, pieces of liver. Of course, you can feed them with only pellets, but for normal molting and growth, the marble crab requires a varied diet.

Content with fish

Marble crayfish can be kept with fish, but you should avoid large and predatory fish that can hunt crayfish. For example, cichlids, some of which are simply fed with crayfish (for example, horn flower, you can even find a video from the link). Smaller fish for adult crayfish are not dangerous, but youngsters can eat.

You can not keep marble crayfish with fish living at the bottom, with any catfish (tarakatum, corridors, antsistrus, etc.), as he eats fish. It is impossible to keep with slow fish and small fish that have voile fins, it will tear off fins or catch fish.

It can be contained with inexpensive live-bearers, such as guppies or swordsmen and various tetras. But, sometimes he will catch them.
Shedding process:


All cancers periodically molt. Before shedding a marble crab, for a day or two, he does not eat anything and hide. If suddenly you saw shell in the aquarium, do not throw it away and do not get scared! Cancer will eat it, there is a lot of calcium in it. After molting, the cancer is very vulnerable and it is necessary that there are plenty of shelters in the aquarium where it can sit out.


Marble crayfish very quickly divorce to such an extent that you will not know where to put them. In Europe and the USA, they are even banned for sale, as they pose a threat to native species. One female can wear from 20 to 300 eggs, depending on her age. The young female is capable of breeding after 5 months. If you want to get small shakes, then decide in advance what you will do with them.

To increase the survival rate, you need to put the female with caviar in a separate aquarium, because the crabs are not averse to eating their own children. When the first crustaceans appear, they are very small and immediately ready for life and feeding. But do not rush to set the female as soon as you see them, she gives birth to them gradually, during the day, after the expiration of which she can be transplanted. Feed the roach can the same feed as the adult marble crayfish, only the tablets are better to grind.

Aquarium crayfish

Aquarium crabs are slow creatures. However, if you experience constant stress, they will give you a piece of calm and measuredness.

What you need to know, so that the maintenance and reproduction of aquarium crayfish is not a burden, and the "claw hands" would live comfortably?

First, crayfish love pure warm (21-27 ° C) water enriched with oxygen. Remember that a small crustacean in 5 centimeters requires 15 liters. Read on for yourself.

And the process of reproduction is a whole performance, which follows immediately after molting. Crayfish approach each other and touch with antennas. Looks like a mating dance. After 20 days, the female begins to lay eggs, which are attached under the maternal abdomen. During this period, the mother-cancer becomes more aggressive, so it is better to drop it off.

With the appearance of tiny crustaceans, the burden of the female becomes heavier. It remains to wait for the first molt of children. Although for some time they will stay closer to mom.

For the comfort of a growing generation in the aquarium, you need the presence of snags, projections, stones. Kids prefer to hide somewhere most of the time, as older individuals constantly try to attack them.

Types of aquarium crayfish

Wide crayfish found in Europe and in Russia. He likes to dig holes in hard ground. The males of this cancer are up to fifteen centimeters long, and the females are three centimeters shorter. Lifespan - fifteen - twenty years. And the care is extremely simple.

In the South you can meet thin flesh. But it is so unpretentious that it can be found in Siberia. Lives in running and stagnant water under the snags, stones, among the algae. It seems that the crustacean is not sleeping at all. He is constantly moving, always busy with something. Sorry, he does not breed in captivity.

Red florida cancer came to us from the western hemisphere. Can live in lakes, rivers and even in swamps. He perfectly tolerates cold, breeds well in captivity. These aquarium crayfish have perfect fish compatibility.

Shell Papuan cancer has an unusual coloring. In length, it can reach fourteen centimeters. It breeds well in an aquarium.

Crayfish heraks - exotic individuals that can reach the size of a lobster. They have bright colors, where there are blue and pink shades. He is "friendly" with the fish and tolerates high temperatures.

Another exotic view - blue cuban cancer. He is unpretentious, gets along well with fish and retains the ability to reproduce in an artificial environment.

Dwarf aquarium crayfish differ from larger ones only in size. Their care, feeding and reproduction are the same.

How to feed aquarium crayfish?

Cancer needs a balanced diet - to the best of vegetable and meat feed. Happy crayfish hide, so better to feed in the evening. These inert inhabitants of aquariums eat and dry fish food.

An unpleasant feature - crayfish hide excess food under stones. And if time does not pay attention to it, the water will rot.

Babies are fed with nauplii of Artemia or microworms.

Diseases of aquarium crayfish are a real threat. Therefore, if you notice that your pet behaves inadequately, he has something changed in appearance - Run to the vet and start treatment.

From the rickettsia bacteria, a spotty staining of blue crayfish is observed, the blood and connective tissues, the epithelium suffer. Plague - an infectious disease that affects the joints of the legs, shell and eyes of cancer. There are also other types of diseases: rust-spotted disease, porcelain, mycosis, fungal infection of caviar and some others. Be carefull.

Is it possible to keep crayfish in a fish tank


Cancers cannot be kept with bottom fish (the same catfish) that will compete for food and shelter, with small fish (neon, guppy, etc.), because at night, when they sink to the bottom, he can eat them, with any fish with a veil and threadlike tail and fins (goldfish, angelfish, labyrinths). It is also impossible to keep with large and aggressive fish, because the crayfish themselves can already suffer here. The temperature of the water in the aquarium should not exceed 25 degrees, the aquarium should be spacious. We need a large soil, because the crayfish dig their holes. Be sure to live plants that they will eat. In the aquarium should be shelter. It is desirable to provide an opportunity to leave the water on land. They feed on crayfish the same as fish, but food should fall to the bottom (for example, food for bottom fish, bloodworms, etc.). Make sure that the crayfish are not malnourished, because they are rather slow, and the fish can take away all the food.

Yuri Ivanovich Podlesny

I kept a couple of crayfish in a 50-liter aquarium with macropods. About shelter, pulling out plants and digging up the soil - all true. Cancers are themselves designers. You can feed any feed with a high plant content. Plants from the aquarium, they practically do not eat, just shred from creative considerations. Not a single fish in my crayfish has suffered, although this does not mean that it would always be like this. I sent the crayfish into the pond when the clouds of suspension in the water from their bulldozer activity were finally bored.

Is it possible to plant decorative crayfish and frogs in an aquarium with fish?


the frogs will hunt for fish trying to devour them, and the crayfish will give pro-ducks to both of them, and only the big clamshell catfish will have everything on the drum ...
In general, frogs, I apologize, they crap very much in a small aquarium. It is better to contain them without fish, you must have a filter. They should be no less but not much more fish.
In practice, I saw how they were kept with tarakatums.
They contain crayfish with fishes, but in a large aquarium from 80 liters and with mobile strong, mobile fishes without veil fins with dimensions not less than the cancer itself. Aquarium preferably with a large number of shelters. Medium-sized bottom catfish coexist peacefully. In an aquarium with crayfish it is better not to plant live plants in order to avoid spoiling them. Very demanding on the purity of water and oxygen content. Be sure to need a good filter and aeration of water. Crayfish can get out of the aquarium, especially at night. The aquarium should be covered with glass and not filled with water to the limit.
It should also be noted that the crayfish are rather shy, and the fish move faster than them and can eat all the food thrown into the aquarium before the crayfish reach it, so it’s better to see that the crayfish got the food and if necessary take it to the shelter where the cancer is located .
And still crayfish are nocturnal and when the light goes out they will hunt down and cut sleeping fish.
Crayfish - scavengers, they well clean the aquarium from not eaten by fish feed, not allowing it to rot. It is best to contain blue Cuban crayfish, they are just suitable for the temperature conditions of domestic aquariums, where they can even breed (I even had rats) They need a medium-sized aquarium with sandy soil and water not less than 24 ° C to keep these crayfish WITH. There should be sand at the bottom, since after shedding they use grains of sand for organs of balance. The water level is 4-5 cm below the edge of the aquarium. Optimum conditions for crayfish: water hardness of 8-12 °, pH 7.6-4.8, temperature 23-25 ​​° C.