Gold fish

How to care for goldfish in an aquarium

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How to care for a goldfish :: Hobby and entertainment :: Other

How to care for a goldfish

Goldfish are a species of freshwater crucian. They are very popular among fans of aquarium fish. However, not all of those who start a goldfish in their home care for it properly, although this is not difficult to do.

The question "how to recognize a chip prefix or not" - 1 answer

Aquarium

There is a wide variety of breeds belonging to the species of goldfish, for example, "Ryukin", "Lionhead", "Vualekhvost", etc. Some of these fish reach 25 - 30 cm in length, so if you decide to have such fish, be prepared for the fact that you need a fairly large aquarium with a capacity of 100 to 200 liters. These aquarium sizes are necessary for the fish to live as long as possible. Small aquariums quickly accumulate ammonia, which causes fish to die.
When choosing a primer for an aquarium, remember that goldfish often burrow into it in search of food, this can cause pieces of stones in their mouths. If you keep these fish, it is advisable to fill the aquarium with large stones or very fine sand. Neither will harm the fish. Wherever you take the primer, you need to rinse it thoroughly before sending it to the aquarium. This also applies to special soil, which can be purchased in specialized stores.
Be sure to put in the aquarium real aquatic plants. They will help to effectively deal with ammonia and other harmful substances that accumulate in it over time. Also ensure sufficient light from the lamps. Goldfish on average require about 12 hours of light per day.
For the maintenance of gold fish aquarium must be equipped with a water filter. It will help to keep the water in maximum purity and will not allow the diseases of fish from harmful impurities, for example, from rotted food particles.

Habitat care

Regularly check the water for the presence of ammonia, its level should always be at zero. In addition, the content of goldfish imposes certain restrictions on the ph level of water, make sure that this figure is in the range from 6 to 8.
Try to regularly clean the aquarium from harmful particles that are not removed by the filter, do it at least once a week. If you do not drain the water to replace it, try not to take the fish out of the aquarium; use a vacuum pump to clean it. If you change the water, transfer the fish using the container, do not use the net for this.
Always prepare the water for the aquarium properly, use special aquarium conditioners for this, they help to bring the water to the desired state. Never use clean drinking water, it will lack the many nutrients needed by these fish.

Feeding and disease

Try to feed the goldfish twice a day at the same time. Also note that these fish may die from overeating, so give them food in small quantities. Be sure to clean the aquarium from the remnants of food immediately after feeding.
Carefully take care of the condition of the water in which the fish lives. Harmful substances that accumulate in it, can cause many diseases. Most often, fish become infected with various parasites that appear on the surface of the body in the form of white and red spots. If you find similar, immediately isolate the fish in a separate container and keep it there until complete recovery.

Breeding and maintenance of goldfish. Goldfish Care

Goldfish in the content of unpretentious, but there are a number of features that should be considered so that your fish do not suffer from unwanted neighbors or as a result of improper care.

Long-bodied and short

Whether short-haired goldfish and long-bodied fish can live together is not an idle question. Despite the fact that these are two varieties of the same fish, it is better to keep them separate from each other. The nature of long-bodied goldfish is characterized by mobility, these fish prefer to move in flocks. It is better to keep them in ponds, because the size of a fish without a tail reaches 30 centimeters. If, nevertheless, you decide to put them in an aquarium, it should be quite spacious (about 200 liters). Such fish as a wakin, a comet or a shubunkin are hardy, unpretentious and not very sensitive, but due to temperament, it is better to keep them separate from their relatives.

The same statement applies to short goldfish. For example, the telescope does not differ in agility, and the sight of this fish is not very strong, therefore, it will not have time to grab food, unlike its more powerful neighbors in the aquarium. The most unpretentious among the short-bodied goldfish are ruinkin and fantail, followed by such fish as the oranda, telescope, ranch, astrologer and lionhead. The most "difficult" recognized pearl and water eyes.

Goldfish Care

The best option would be to purchase an aquarium of 100 liters for two goldfish. In this case, they will be where to swim, and they will be able to grow to its maximum size. In order not to hurt the main decoration of a goldfish - a veil fin, choose an aquarium with a length of at least one meter and a width of at least 30 cm.

Aquarium equipment

Care for goldfish is very important. Be sure to take care of the technical equipment of the aquarium for fish. Since goldfish can quickly pollute their homes, the larger the area of ​​the aquarium, the lower the concentration of ammonia in the water. Of course, it is necessary to install a powerful aquarium filter for keeping goldfish. Along with the filter, it is necessary to equip the home of the fish with a thermostat and an aerator. Water hardness should be dGH up to 20 °, and acidity should be pH 6.5-8.0. Twice a week it is necessary to replace from 20 to 35% of the volume of water. Naturally, the water should be separated and have a temperature equal to the temperature of the water in the aquarium.

Goldfish adore plant foods. It is advisable to choose for them hard-leaved plants with powerful roots. In order not to dig the fish plants, you can plant plantings in pots and put stones on them.

A special feature of goldfish is the constant digging of soil. This is not surprising, since they are descendants of crucians. That is why it is necessary to choose coarse sand for them, the fraction of which does not exceed 1-3 mm, and there are no sharp edges.

Goldfish are unpretentious in food, but you should not overfeed them, enough to feed them once a day. If you take into account all the features of the content of the fish, they will remain healthy and will be able to please you and your loved ones for a long time.

Goldfish: content at home

Goldfish, which marked the beginning of aquarism as such, are now, unfortunately, out of fashion. Professionals consider it uninteresting and not worthy of attention, and only a few connoisseurs and experts of this type remain. Therefore, the lot of most cinchons is kindergarten or hospital aquariums with plastic plants or a short life in a beautiful glass given to a person for the holiday, far from fish problems. Let us treat this beauty with the respect and interest that she deserves, and see what is necessary for her for a long and happy life near us.

How demanding are goldfish to conditions?

Opinions on this score are opposite. Some believe that this is a patient, practically unkillable, fish that survives in any conditions, suitable for beginners and people who do not want to invest in the aquarium a lot of effort and money. Others, on the contrary, argue that the content of gold must comply with a number of fairly tough conditions, and they are no doubt right. A goldfish should not be started by someone who is not ready to make efforts for its comfortable existence. And the most important condition for the maintenance of these fish is an aquarium of a sufficiently large volume.

Volume and shape of the aquarium

In Soviet literature of the last century in aquariums it is indicated that one goldfish should have 1.5-2 dm3 of water surface, or 7-15 liters of aquarium volume (15 liters per fish is considered to be a small landing density). This data migrated and in some modern tutorials. However, it should be noted that Soviet books were written about goldfish of domestic breeding, which for many generations lived in aquariums, and as a result of breeding were adapted to such conditions. At the present time, the vast majority of goldfish comes to us from China, Malaysia and Singapore, where they are massively bred in ponds. Accordingly, they are not adapted to life in small volumes of water, and even to a sufficiently spacious aquarium they need to be adapted, and a volume of 15-20 liters means death for them within a few days.

Experts who today work with goldfish brought from Asia have empirically established:

The minimum volume of an aquarium for one individual should be about 80 liters; in a smaller volume, an adult fish will simply have nowhere to move. For a couple - 100 l.

In large aquariums (200-250 l), with good filtration and aeration, the density of planting can be slightly increased, so that the volume of water is 35-40 liters per individual. And this is the limit!

Here, opponents of half-empty aquariums usually object that in zoos, for example, goldfish are very densely packed in aquariums and at the same time they feel great. Yes, indeed, this is the specificity of the exhibition aquariums. However, one should keep in mind that behind the frame there are several powerful filters with which this monster is equipped, the most severe schedule of water changes (up to half the volume daily or twice a day), as well as the regular ichthyopathologist veterinarian for whom there is always work.

Regarding the shape of the aquarium, the classical rectangular or with a slight curvature of the front glass is preferred, the length should be approximately twice the height. In the old Soviet literature it was stated that water should not be poured above the level of 30-35 cm, but as practice shows, this is not critical. Goldfish live well in higher aquariums, if they have the appropriate width and length (tall and narrow aquariums - screens and cylinders - are not suitable for keeping gold).


What types of fish are compatible gold?

The answer to this question is unequivocal - the best option would be a specific aquarium where only goldfish live. Moreover, even short-bodied and long-bodied gold lodging is often not recommended together, but representatives of other species of fish are out of the question. Either the neighbors will harass the scones, damaging their eyes and fins, or the neighbors themselves will be uncomfortable, as the aquarium with goldfish is a very peculiar habitat. In addition, small goldfish can simply swallow.

Water parameters, design and equipment of the aquarium

Goldfish comfortable with the following indicators of water:

  • temperature 20-23 °, for short-body forms slightly higher, 24-25 °;
  • pH of about 7;
  • stiffness not lower than 8 °.

The soil in the aquarium should be chosen so that the fish, digging into it, do not choke - its particles should be without sharp, protruding edges and either larger or much smaller than a fish mouth.

In the aquarium with goldfish must certainly be living plants. Consuming nitrogen, they have a positive effect on the ecological balance, are an additional substrate for bacteria performing biofiltration, and also serve as vitamin supplements for fish. Goldfish mercilessly dig in and gnaw plants, but this should not be the reason for refusing to populate the aquarium with lively greens.

Lemongrass, Anubias, cryptocoryne, Alterner, Bacopa, sagittaria, Javanese moss get along well with gold. It is recommended to plant the plants in pots so that the digging does not damage their roots. And as a top dressing, specifically give the fish a duckweed, Riccia, wolf, and a hornpole.

Mandatory good round-the-clock aeration. At a minimum, an aerator on the filter should be turned on; it is better to additionally have a compressor. If the aquarium has a high density of living plants, a powerful light and the supply of carbon dioxide is organized (in such conditions the leaves of the plants should be covered with bubbles of oxygen emitted by them), then the aerator is turned on only for the night.

In the design of the aquarium should not use large objects of decor - snags, grottoes, etc. Goldfish do not need shelter, but the fins of the valehvostoy, telescope eyes, growths about them are easy to injure, besides the shelters take up space for swimming.

Filtration and water changes

It is generally recognized that goldfish are a large biological load on an aquarium. Simply put, they are dirty, producing a huge amount of waste. Their habit of constantly rummaging in the ground, raising the dregs, also does not add cleanliness to the aquarium. In addition, goldfish excrement has a mucous consistency, and this mucus pollutes the soil and contributes to its rotting. Accordingly, in order to keep the water clean and transparent, a good round-the-clock filtration system is required.

The filter power should be at least 3-4 volumes of the aquarium per hour. The best option would be a canister external filter. If you can not buy it, and the volume of the aquarium does not exceed 100-120 liters, you can get by the internal filter - always with multiple sections and a compartment for ceramic filler.

Porous ceramics is a substrate for bacteria, which process poisonous ammonia released by fish into nitrites and then into much less toxic nitrates. In addition, the substrates for these bacteria, a stable amount of which is vital for the well-being of the aquarium, are soil and aquatic plants, especially small-leaved ones. Therefore, it is desirable to have a lot of plants, and the soil fraction should not be made too large.

In order for the colonies to not collapse when cleaning the aquarium, some rules must be observed: the filter sponges are washed in the aquarium water (the sponges are washed quite often, about once a week), the siphon of the soil is also weekly, done carefully, without mixing it layers, ceramic fillers for biofilters are always partially changed.

Even with high-quality filtration in an aquarium with goldfish, it is necessary to do weekly from a quarter to a third of the volume of the aquarium, and more often if the density of fish landing is violated. The fishes of this species tolerate fresh water well, so there is no need to defend it for more than a day.

Feed

Now that we have dealt with the main, most difficult and costly content of goldfish, we can talk about how and what to feed them.

They are usually fed twice a day, giving the amount of food that fish are able to eat within 3-5 minutes. Dry flakes and granules are recommended to alternate with vegetable food - spinach leaves, lettuce, boiled vegetables and cereals, fruits (orange, kiwi). Sometimes you can feed pieces of meat or liver, as well as frozen motils. It is necessary to take into account that the pellets of dry food should be soaked for 20-30 seconds in aquarium water, and thawed frozen food before giving them to fish. Very useful regular feeding live daphnia, which you can grow at home. In addition, as mentioned above, it is always better to have special food plants in an aquarium. Once a week, fasting days are arranged.

Diseases

Diseases of goldfish are a subject for a separate article, but here we briefly consider only signs that may indicate that the fish are sick or have severe discomfort:

  • loss of appetite;
  • lowered dorsal fin;
  • bulging scales, red or black spots that quickly appear, ulcers, rashes, mucous or cotton-like plaque;
  • distended abdomen and bulging eyes stronger than usual;
  • unnatural behavior: the fish stays in the corner of the aquarium for a long time, lies at the bottom, rolling over on its side, or swimming near the surface, swallowing air from it;
  • rolling over while swimming.

It should be noted that with proper maintenance of health problems in goldfish are quite rare. If you initially create good conditions for these animals (a spacious aquarium with live plants and powerful filtration), then care of them will be available to the beginner or even to the child, and for many years they will delight their owner with bright appearance and funny behavior.

What are goldfish, you can learn from the video:

Tell me how to care for a goldfish living alone?

M! Ko

Top 10 rules for beginners to care for a goldfish:
1. For a goldfish you need a large enough aquarium. The aquarium of a classic round shape, can be opened from above, or without a lid at all - not a very suitable aquarium for keeping these fish, contrary to popular opinion. It is difficult to keep the fish alive and healthy. Many experienced aquarists recommend no more than 2-3 fish per gallon of water. Based on this, we can safely say that 2 gold in 10 liters of water will feel good, but if their number is increased, the level of water pollution in the aquarium increases and work for the aquarist is added.The maintenance of goldfish in large aquariums is more convenient, since in large aquariums it is easier to maintain biobalance (however, for a comfortable and convenient maintenance of a goldfish, it is necessary to repel from 40-50 liters per specimen, because goldfish do not remain small during life, but become more and more and they need more volumes.
2. Buy an aquarium filter with the ability to pump air. A goldfish needs water that is rich in oxygen, because unlike labyrinths, it breathes oxygen dissolved in water.
3. Buy the correct "contents" of the aquarium: the gravel on the bottom will be perfect - there are useful bacteria in it that consume ammonia and lower its level in the water. Just make sure that the gravel is not a very small fraction, as the goldfish can eat it.
4. Wait a bit after launching the aquarium with a goldfish transfer to its new home. First, the biobalance should be established there. To do this, after starting the aquarium, you can put snails there or a couple of catfish, which will slightly “pollute” the aquarium, ammonia is digested by bacteria and the water becomes suitable for running fish (this process can take from several days to a week).
5. Feed the goldfish need the right food. There is a special granulated food or food in the form of flakes specifically for goldfish. For gourmets, it is advisable to add finely chopped lettuce to the surface of the water in the aquarium and even hard-boiled eggs — the goldfish will eagerly eat them.
6. In no case should a goldfish be overfed. Do not throw more food than she can eat in 3 minutes. A good time to determine the amount of feed - the first feeding of your pet. You only need to watch her and determine how much food she ate during these three minutes. Always remember that the golden fish loves to overeat.
7. Periodically conduct water tests from the time the fish was launched: these are tests for pH (which should be 7-8) and for ammonium, nitrite and nitrate. Ammonium and nitrites are harmful to the inhabitants of the aquarium, so if they are greater than 0, it is not very good. The rate of nitrates is up to 40.
8. Be sure to place a thermometer in the aquarium. A goldfish is a tropical fish, and it will be bad to live in cold water. The ideal temperature in such an aquarium should be around 21 degrees (some authors indicate a higher temperature in the aquarium, and 21 ° C is considered a low degree for tropical fish).
9. Do not forget to make regular water changes. For a 5-10 liter aquarium, a replacement of 25-30% of water is needed once or twice a week. You pour the old water into any container, and you add new water (you can add a special water conditioner) to the aquarium. A complete replacement of water is not recommended, as this will destroy the biobalance and the fish (as well as the plants) may feel bad. (I repeat again that the content of a goldfish in 5-10 liters is a mockery of a fish)
10. Familiarize yourself with the various diseases that can affect your darling. Knowing the symptoms will help you quickly recognize the disease and, possibly, save the lives of the inhabitants of the aquarium.

How to care for goldfish?

Lord

Goldfish have long been considered very unpretentious, and in the literature indicated that their content does not cause any special difficulties. Is it so? Only partly, especially now, given the overwhelming majority of low-quality "imports" from Southeast Asia. We can say this: the maintenance of goldfish will not cause difficulties in fulfilling a number of conditions: a spacious aquarium, a moderate population density, the presence of a powerful filtration system and aeration combined with regular partial water changes.
What is contained in the word "content"? This term hides a set of actions that can be conventionally classified as follows.
1. Arrangement of an aquarium and its settlement with fish.
2. Feeding.
3. Regular care for the aquarium and disease prevention.
5.1. AQUARIUM
So, you have become the happy owner of an aquarium with a capacity of at least 100 liters (why not less - read below) and want to start a goldfish ...
5.1.1 Soil
We define for a start with the ground. A 3-5 mm fraction is considered a good primer for an aquarium, however it should be noted that goldfish adore this fraction to be sorted out and, under certain conditions, the pebble can get stuck in their mouths, therefore some aquarists recommend a larger fraction, or, conversely, smaller. But you should not dwell on it much, this happens quite rarely, just make sure that the stones do not have rough or sharp edges. In extreme cases, you will have to save the unfortunate creation with tweezers or a toothpick.
5.1.2 Aquarium equipment
1) Internal filter. Goldfish are distinguished by rather large mud formation both in connection with their physiology and due to their love for digging in the ground. Therefore, a good internal filter for mechanical cleaning in an aquarium seems necessary. Requires regular cleaning (washing in aquarium water during changes).
2) External filter. It helps to organize biofiltration in an aquarium, especially when using special fillers, a rather useful, although not absolutely necessary device. Indispensable when there is a desire to save space in the aquarium. A big advantage is also that it requires cleaning much less frequently than an internal filter.
Since many manufacturers specify the passport capacity of filters without fillers and with time as they become more contaminated, it is recommended to purchase filters, both internal and external, based on performance of 3-4 volumes of aquarium per hour.
//www.aqa.ru/goldfish_soderjanie

Golden fish

Depends on the type of fish.
The comet, shubunkin and obzobny goldfish are undemanding to the conditions of detention, which cannot be said about veil tails, telescopes, celestial oceans, orande and others. Goldfish need a large amount of water with good aeration. An adult fish requires about 4.5 liters of water. The chemical composition does not matter. The temperature should be from 24 to 26 degrees. From plants it is better to plant sagittariya, valisneria, duckweed. Plants with sharp edges are not allowed. This is especially true for fish with long fins, because they can get hurt. Gentle plants are also unsuitable, a pack to. Goldfish spoil them. Lighting should be very bright. It is better to feed goldfish with moth, sliced ​​earthworm, daphnia. In the absence of live food, scraped meat will fit, mixed in half with bread in balls, the size of a pea. It is impossible in any case to overfeed goldfish, because this leads to obesity, and obesity to infertility.
Normally developing goldfish reach sexual maturity by the year. Mature males begin to swim for females, keeping close to the ovipositor. A female should have a fat, caviar-filled abdomen. Before spawning selected fish must be zealously fed with live food.
Spawning capacity of aquariums depends on the size of the fish. As spawning substrate use small-leaved plants, willow roots, nylon threads. For spawning, one female and two or three males are placed in the aquarium. Spawning should take place at a temperature not lower than 16 g. C, ideally, at 25g. The aquarium should have constant aeration and lighting. Spawning lasts up to 5-6 hours. For 1 time, the female leaches up to 20 eggs, all the same they can be up to 3000. After spawning, the fish are removed from the aquarium, because they devour their eggs with pleasure. First, the caviar is slightly amber in color, then it becomes transparent enough so that it can not be noticed. Do not allow direct sunlight on caviar, shade newspapers. The water level is better to lower a little.
Larvae will appear on the 4-5th day.
After the fry appear in the aquarium, it is necessary to launch the coil snails so that they eat unfertilized eggs. Fry begin to swim and eat for 2-3 days. At this time, they are fed "live dust." After 2 weeks, they switch to daphnia and cyclops feeding, then the feed is further enlarged. Fry need to be fed often, 6 times a day, but in small portions.

Oksana Epova

There is nothing special, just need to remember one thing: goldfish are also called "pigs." This is because they dig the ground and necessarily pick out all the plants whose roots are not attached to anything (shell, pebble, etc.), so you will have to adjust the design of the aquarium under them, otherwise you just "will not beauty. "

How to care for goldfish?

Marina

In fact, not so difficult. You need to buy a compressor that will enrich the water with air, you need to buy more vegetation (in reasonable aisles), you need to add orderlies (aquarium snails - they eat all the feces and everything else, making the system more self-sufficient). You will also need to download information on how to properly maintain a fish (what to feed, and most importantly, how much food to give - here is a whole science. Underfeed will die, overfeed - there will be chaos in the aquarium, the water will rot and the fish will die too). Mangantsovki would still buy - the fish sometimes get sick ...

Olga Eremina

Goldfish are very voracious, but not eaten food spoils with amazing speed and can poison the water in the aquarium overnight. It is better to feed the fish several times a day, but in small portions, which will be eaten clean.
Eroded food carefully caught within 5-10 minutes. In the extreme case - after 15, if you keep the breed, famous for its awkwardness (telescope, celestial eye). For the same reason, I advise the dining room to be built in a plant-free part of the aquarium.
And what would you like to eat an adult fish? God did not hurt her appetite. Perhaps it can’t even be called legible: koretra, tubers, large bloodworms, earthworms, delicate leaves of aquarium plants, scraped meat, steep buckwheat cereals, oatmeal, plain white bread, patented food eaten with enthusiasm. A goldfish needs less protein than our tropical diesel friends and more carbohydrates. Therefore, all firms that are serious about fish diets produce a special diet for goldfish. In addition to the essential nutrients with a higher proportion of carbohydrates, these foods contain natural supplements that improve the yellow, orange and red colors.
By the way, about the tender leaves of plants. It is best to plant plants with sufficiently rigid leaves that do not require water heating (beancap, vallisneria, sagittaria, arrowhead), and not in the ground, but in a pot, and reliably protect this pot with large pebbles. Goldfish sometimes take possession of a completely non-aristocratic passion for excavation, and they ting the soil that your catfish. And then - goodbye, roots!

Jenshen

first read here //www.aqa.ru/forum/vt84481
from my own experience - the more liters per fish the better ... cleaning the aquarium for gold is held 2 times a week anyway (they eat too much, well, cf.
so as not to eat the vegetation in aquas - more natural plant food - pumpkin, cucumber, cabbage, carrots, etc.

Olga Khlynina

This is generally some sort of roasting. Sweep everything. And then so much and spoil. While small-no problems. But grow from the palm! Can they secure a happy future? And, in addition, they are cold-loving. The mode of most fish they are not comfortable. And to cool water is much harder and more expensive than heating. There are pluses: they are not whimsical to the composition of water, food, cleanliness. Conclusion: either a pool for their maintenance, or an aquarium with a curved surface (round) for one young fish. How to grow up in her ear.

How to care for goldfish, what to feed, do you need a compressor, algae, where to put the aquarium?

incognito spain

for one gold you need at least 50 liters. No balls and glasses, even if small. Filter take more powerful. Gold is very dirty water. Living plants that do such important work in an aquarium as the absorption of harmful substances cannot exist in an aquarium with zoltymi because they will eat it. Light is not needed strong. Heater too. Compressor is desirable.

Kristina Malyarenko

2. Buy an aquarium filter with the ability to pump air. A goldfish needs water that is rich in oxygen, because unlike labyrinths, it breathes oxygen dissolved in water.
3. Buy the correct "contents" of the aquarium: the gravel on the bottom will be perfect - there are useful bacteria in it that consume ammonia and lower its level in the water. Just make sure that the gravel is not a very small fraction, as the goldfish can eat it.
4. Wait a bit after launching the aquarium with a goldfish transfer to its new home. First, the biobalance should be established there. To do this, after starting the aquarium, you can put snails there or a couple of catfish, which will slightly “pollute” the aquarium, ammonia is digested by bacteria and the water becomes suitable for running fish (this process can take from several days to a week).
5. Feed the goldfish need the right food. There is a special granulated food or food in the form of flakes specifically for goldfish. For gourmets, I can advise you to add finely chopped lettuce to the surface of the water in the aquarium and even hard-boiled egg pieces — a goldfish will willingly eat them.
6. In no case should a goldfish be overfed. Do not throw more food than she can eat in 3 minutes. A good time to determine the amount of feed - the first feeding of your pet. You only need to watch her and determine how much food she ate during these three minutes. Always remember that the golden fish loves to overeat.
7. Periodically conduct water tests from the time the fish was launched: these are tests for pH (which should be 7-8) and for ammonium, nitrite and nitrate. Ammonium and nitrites are harmful to the inhabitants of the aquarium, so if they are greater than 0 it is not very good. The rate of nitrates is up to 40.
8. Be sure to place a thermometer in the aquarium. A goldfish is a tropical fish and it will be bad to live in cold water. The ideal temperature in such an aquarium should be around 21 degrees. (here the author is right, but not in everything, because in the usual understanding of tropical fish, we mean a slightly higher temperature value in an aquarium, and 21 can rather be called a low degree relative to the word "tropical" - note. Nikita Matukhno)
9. Do not forget to make regular water changes. For a 5-10 liter aquarium, a replacement of 25-30% of water is needed once or twice a week. You pour the old water into any container, and you add new water (you can add a special water conditioner) to the aquarium. A complete replacement of water is not recommended, as this will destroy the biobalance and the fish (as well as the plants) may feel bad. (I repeat again that the content of a goldfish in 5-10 liters is a mockery of a fish, - Nikita Matukhno comment)
10. Familiarize yourself with the various diseases that can affect your darling. Knowing the symptoms will help you quickly recognize the disease and, possibly, save the lives of the inhabitants of the aquarium.
To keep a goldfish can be very fun and interesting. Believe me, this is worth all the preparation when you see a healthy, fun and beautiful goldfish in an aquarium running by your own hands.

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