Green water in the aquarium


Why did the water bloom (turned green)?

Have you ever heard that the water in the aquarium bloomed or turned green, and very quickly. What to do in this case? First, you need to find out the reason, and second, learn how to deal with it.

The reasons for the appearance of green water in the aquarium

Why is the water in the aquarium green? The reason is as follows: when blue-green algae reproduce, or euglena, to wait for the landscaping of the water. You should know that these algae are single-celled and they float on the surface of the water in the form of an invisible film. Euglena is an important part of the food chain of the underwater world, and under the necessary conditions (reduction of nutrients, carbon dioxide and oxygen, a wide range of temperature conditions), it is rapidly multiplying. It is not so easy to get rid of the flowering of water, given its sudden flashes. With strong light (green algae love it), with frequent renewal of water using chemicals, the biological filtration system of aquarium water gets lost, as a result of which euglena multiplies and grows.

How green algae appear in water - additional reasons

Blue-green algae like long-lasting lighting, more than 10-12 hours a day. This is another reason why the reservoir blooms. When you start a new aquarium, you should light it gradually, starting from 4 hours a day, increasing the number of daylight hours to 10 hours. Also, do not forget that with an excess of fertilizers for plants, the amount of phosphorus decreases. Plants grow poorly, and the water begins to turn green. That is why it is necessary to eliminate all the errors that are allowed during the maintenance of the aquarium:

  • When starting the aquarium, the illumination is set up incorrectly, a large number of plants are planted;

Watch the video story about aquarium lighting.

  • Frequent tank maintenance (water renewal, cleaning, aeration);
  • Enhanced feeding of fish;
  • High water temperature in the tank;
  • Reverse cases - a rare care for the aquarium - not enough aeration, fresh water, no compressor.

Green turbidity of water - not a sentence

Why is water blooming not a sentence? If you know the main thing that "green" causes ammonia emitted by algae, everything will quickly fall into place. New, recently launched aquariums are sometimes not serviced correctly, which causes an incorrect nitrogen cycle. The first outbreak of euglena can lead to the fact that it will be difficult to get rid of it forever. To regulate the nitrogen cycle when starting the aquarium, turn on the light for only a couple of hours for 30 days, use the “old” water from the old aquarium and the used filter cartridge. This normalizes the nitrogen cycle.

There are more ways to get rid of algae. What to do:

  • Use an ultraviolet sterilizer to help neutralize euglen. Once turned on, it will destroy algae cells with ultraviolet light.

See how to choose the right UV sterilizer.

  • Install a diatom filter - an effective way when dealing with green algae.

  • Turn off the light in time. This method controls the appearance of "green" water, and will save time and money on additional equipment. Cover the aquarium on time. Feed the fish and other inhabitants of the aquarium for 7 hours of daylight. Healthy plants can live in water for about a week without using light. After the procedure, you can change 30% of the water to fresh.
  • The use of coagulants - small particles in a mechanical filter that removes flowering from a water tank.
  • Destroys the blue-green algae granular activated carbon added to the filter. In the process of "treatment" the filter can be cleaned 1-2 times a week.
  • The use of micro cartridges also blocks outbreaks of flowering.
  • In certain cases, combine these methods while simultaneously applying filters and ultraviolet (as an example).

How to deal with fish, if the water turned green?

The disturbed biological balance of the aquatic environment quickly deteriorates the health of living beings living in it. There are good recommendations that are suitable for aquariums with small fish, where the water is green, and the plants are not planted deep in the ground. To prevent the fish from getting sick, the following procedures should be performed:

  • send pets to other aquariums or tanks with clean water and similar composition of water; make sure the fish do not get sick;

  • transplant plants into other containers, adding methylene blue to them - the dose can be found on the package;
  • clean the aquarium from the old soil, and buy a new one, treat it from parasites;
  • dispose of green water (pour it into drains);
  • empty container should be washed, filled with new water, adding to it 1-2 teaspoons of soda, which will create alkali;
  • leave the aquarium with soda for 24 hours;
  • re-boil the aquarium snags, the grottoes and artificial decorations can be transplanted into the aquarium with soda, after treatment, rinse everything in running water;
  • After the procedure, you can start the aquarium again.

Why is the water green in the aquarium :: the water is green in the aquarium what to do :: Aquarium fish

Why is the water green in the aquarium?

"Flowering" of water is typical for various reservoirs, including home aquariums. Water usually turns green in the summer - in July or August, this process can be accompanied by an unpleasant smell and death of the fish. To get rid of the "flowering", you need to find out its cause.

The question "opened a pet shop. Business is not going. What to do?" - 2 answers


1. In addition to fish, snails, plants and other living creatures, plankton lives in an aquarium, causing water to bloom - filamentous and unicellular green algae. In conditions of medium or low light, low water temperature, phytoplankton multiplies slowly, the water remains clear. Some factors contribute to the intensive increase in the mass of microorganisms.

2. The most basic reason for the enhanced growth of microscopic algae is a large amount of light. If the aquarium's lighting is too intense, the water may turn green even in winter. In the summer, there is enough natural daylight to “bloom”, especially if the aquarium is in direct sunlight.

3. The second important factor in the "blooming" of water is the increase in its temperature. The active division of phytoplankton begins when the water temperature becomes higher than the average annual.

4. The presence of excessive amounts of organic matter in water is another factor contributing to the growth of microorganisms. If you poorly conduct aquarium hygiene and regularly overfeed the fish, phytoplankton, especially Euglena green, begins to divide in this nutrient medium.

5. The last factor affecting the purity of the aquarium is the lack of clean water. If you save on the filter and aeration, chemical and chemical balance of water suffers, which leads to the transformation of the aquarium into a "swamp".

6. The most radical way to get rid of "flowering" - a complete replacement of water, followed by shading the aquarium. If it is problematic to completely change the water, it can be changed to a third and cover the aquarium from the light. Without illumination, phytoplankton will cease to multiply, and infusoria, for which it is food, will purify water. In addition, the aquarium can be populated with daphnia, shrimp, catfish, snails, which also feed on microscopic algae.

7. If the water is green - reduce the amount of food for the inhabitants of the aquarium. Normally, fish should eat everything in 5-15 minutes. For a day or two, you can even completely stop feeding - the fish will have enough of the food that is already in the water. Watch also for the proper operation of the devices for filtering and aerating the aquarium - this helps to avoid excessive accumulation of organic matter in the water.


A slight greening of the water for the fish is not considered dangerous, but if the “bloom” is strong enough - it can be fatal for some inhabitants of the aquarium. Green algae litter the gills of fish, and in addition, at night, phytoplankton needs oxygen, as a result of which the “official” inhabitants of the aquarium begin to choke.

Helpful advice

If all your efforts do not lead to water purification, try using chemicals - they can be purchased at pet stores. At observance of the instruction and the specified doses these substances are safe for inhabitants of an aquarium and plants.

What caused the bloom of water in aquariums?

Almost all aquarium lovers ask the same question: why is the water in the aquarium turning green? And although this phenomenon does not harm the inhabitants of the small underwater world, from the point of view of aesthetics, the aquarium view is spoiled. In addition, the green water in the aquarium will be disastrous dangerous for fish running directly from a clean pond.

We will try to figure out why water is blooming, and what to do about it.

Main reasons

Water blooms for various reasons, and therefore you need to have a general idea of ​​all of them. So:

  • First of all, improper lighting can spoil the water in the aquarium. This is due to the fact that the aquarist simply does not know the simplest rules of lighting. Water may bloom due to excessive lighting in the aquarium or due to improperly selected light mode for the season;
  • also, the water in the aquarium may bloom due to pollution;
  • finally, another reason for the bloom of water is improper feeding.

Often, beginning aquarists, because of ignorance of the key feeding rules, themselves provoke the fact that the water is green. This may be caused by a large amount of feed. Since the fish do not eat much at once, the remains of food settle to the bottom of the aquarium and begin to rot.

That is why there is a blooming of water in the aquarium. Accordingly, in order to prevent this, it is necessary not to make the listed errors. But what if the water in the aquarium has already become green?

Elimination of provoking factors

It is clear that you will need to clean the aquarium and change the water. True, you should not just constantly change the water. The fact is that the algae will only multiply more actively. But you also need to eliminate the cause. Above, we examined the main factors that cause water blooming. If these factors are established correctly, the following measures can be taken.

If the cause is lighting

Objectively speaking, the issue of lighting is solved even during the installation of the aquarium. But if this has not been done before, you can do the following. First, try to darken the aquarium slightly. Secondly, try to ensure the appropriate light mode for the season. This means that in the winter the underwater world should receive coverage about 10 hours a day, while in the summer it will take 12 hours;

If it's pollution

In this case, you need to quickly and efficiently clean the water. In this issue you can take into account several useful recommendations.

  • So, you can run more daphnids alive. A little more means as much as your fish cannot eat at a time. The fact is that daphnias effectively deal with algae that fill the space under water;
  • You can also purchase special drugs that are designed specifically for cases with green water. Such drugs are sold in almost all pet stores;
  • An effective way would be to settle into the aquarium of such creatures who love to eat algae and, therefore, help in matters of water clarification. Such creatures include mollies, snails, shrimps, catfish;
  • If soil contamination is observed, it should be thoroughly cleaned. At this time, the inhabitants of the aquarium should be transplanted into a different container;
  • It is possible that the pollution is due to equipment malfunction, so it is worth checking its condition;
  • They also recommend using a chemical cleaning method. Its essence lies in the fact that streptomycin powder dissolves in water, and the resulting solution is added to the aquarium. Do not be afraid, because this method is absolutely safe for fish;
  • In addition, there are specially designed filters to eliminate green water. For example, there is a sterilizer that destroys algae with ultraviolet rays.

If contamination is caused by improper feeding

Everything is very simple here. If you have accurately determined that water is polluted due to improper feeding, then you need to carefully study the relevant instructions. To properly feed the fish, you will need to strictly follow the instructions of such instructions.

Thus, to eliminate the flowering of water in the aquarium is quite simple. But for this it is important to determine why this is happening.

Why is the water in the aquarium green?

The most common question that interests all aquarists is why is the water and soil in the aquarium turning green? Despite the fact that the blooming water does not cause much harm, but the aesthetic appearance deteriorates quite noticeably. Such water can become dangerous for fish if run from a fresh pond. To choose a method to combat this problem, you need to establish reliable causes of flowering.

Why is the aquarium green?

The cause of the turbidity of the water is considered "euglena", known as free-floating alga. It is an integral part of the food chain and quickly adapts to environmental conditions.

The national name "green water" accurately describes the appearance of the vessel, in which such alga is present. Most often, aquarium owners are faced with a problem eugle some weeks after launch. But why does the water turn green in the aquarium and the algae reproduction begins? There are several reasons:

  1. Wrong lighting. Excessive light triggers the growth of small algae. If the lighting in the aquarium works for more than 10 hours, then this can be considered favorable conditions for the development of euglena. Starting the aquarium lighting should be turned on for 4 hours, adding a couple of hours in 3 days.
  2. Excess ammonia. That it is often available in new aquariums and with large-scale changes of fluid. Watch out for the composition of the water you are adding and this problem can be avoided.
  3. Improper feeding. Overfeeding the fish can cause water bloom. Excess food, not eaten by fish, will settle at the bottom and will be the main reason why the stones are green in the aquarium.

What to do if the walls of the aquarium turn green?

First you need to eliminate the causes evgleny. If the matter is in the wrong light, either set a suitable light mode, or deprive the aquarium of direct sunlight. If the reason is unknown, then you can resort to the methods:

  1. Run into the water a lot of living daphnia. They will quickly deal with small algae and clean the water.
  2. Get drugs from Euglena.
  3. To lead creatures that lighten the waters: catfish, mollies, snails, petilia,
  4. If the soil is contaminated with organic waste, transfer the fish to another tank and clean the soil.
  5. Use diatomaceous filters, UV sterilizers or micron cartridges.

By following these tips, you will keep the water in the aquarium crystal clear and fresh.

All the reasons why greens appear on the walls of the aquarium

Aquarium fish - the choice of many people. They are quiet, do not litter, do not ask to walk at six in the morning and do not make races on sleeping owners at three in the morning. In addition, the aquarium is very lively interior, for its inhabitants is very interesting to watch, and care for all this good is relatively uncomplicated.

However, often "water house" begins to upset his owner. The water becomes cloudy, the walls begin to overgrow, an unpleasant smell can appear. There is a strong concern: whether these unpleasant manifestations will harm the residents of the glass house.

The first thing that comes to mind

The most common reason why greens appear on the walls of an aquarium is an excess of light. It may be too bright or too long. Direct rays of our Sun also have a negative effect on the state of water. The light favors the active reproduction of the simplest (single-celled) algae, which first “plant” the liquid medium and then begin to grow on the inner surfaces of the aquarium.

To deal with this is very simple. Shade a fish house. If the greens on the walls of the aquarium have not yet fully tightened them, the breeding process will at least stop. Snails and daphnids can destroy the attack. The latter must be run into the "pool" in such an amount that the fish do not have time to eat them. And if you want to diversify the population of the aquarium, buy catfish - they do an excellent job with thickets on the walls.

Some aquarists believe that partial landscaping gives good results during landscaping - naturally, with filtration. This is not true. On the contrary, such actions will lead to even greater growth of the green colony.

Hygiene and hygiene again!

The second most important factor explaining why greenery appears on the walls of an aquarium is its rare or careless cleaning. The uneaten food, the fallen leaves of underwater plants, the uncleaned sewage in time creates comfortable conditions for the active growth of the same unicellular algae. Most often, such accumulation creates excess feed. Понаблюдайте за питомцами: если за четверть часа они не съели насыпанное, остатки удалите, а в дальнейшем уменьшайте количество.

Если у вас зеленеют стенки аквариума, это может означать засорение фильтров или порчу аэрационного оборудования. Проверять и то, и другое надо хотя бы раз в месяц, а для фильтров - еще чаще.

And if the light is not enough?

In the first two cases described, a circumstance explaining why greens appear on the walls of the aquarium is excessive lighting: in the first one, in the second - indirectly, stimulating the rotting of the underwater garbage. And with such a problem is not difficult to cope.

However, the so-called diatoms, which like a lack of light, can cause plaque on the walls of the aquarium. For many "fish farmers" they appear in the winter if there is no additional lighting, and with increasing daylight they disappear by themselves. Such algae are unpleasant because they cling to the surface almost tightly. If you can tear them away from the glass, it is still possible, albeit with the risk of scratching, then there is no way from the plants.

Diatoms look like yellow or brown flat formations. The first step will naturally be an increase in light. However, if this did not help, then the reason is the presence in the aquarium water of a significant concentration of silicates. Accordingly, you will have to go to the pet store for the filter, absorbing them.

Multicellular evil

So far, they have been talking about unicellular unwanted "neighbors". However, the most terrible enemy are multicellular - cyanophytes. They are the reason why greens appear on the walls of the aquarium, with a bluish or brownish tinge. They begin to spread from the bottom, then they crawl along the walls and plants with unpleasant thick mucus. They can also form floating islands, making it difficult for oxygen to enter the aquarium.

The nitrogen-containing compounds are to blame for cyanophytes, and again, an excess of light contributes to rapid reproduction. It is very difficult to remove these algae, it is better to prevent their generation. First of all, it is necessary to plant many plants at once in a new aquarium, combining them with floating species that grow quickly (fit the elodea, nyas or pemphigus), it is better to lower the pH of the water to the mark 6. Algae-eating fish will also be very helpful in the difficult struggle. The smallest colonies of blue-green pests must be immediately cleaned. If you are lucky and if the process is not too running, you will win them. If not, you will have to re-equip the aquarium.

The good news is that blue-green algae in a healthy glass house does not survive, so this attack happens quite rarely.

Green water in the aquarium. Why is the water in the aquarium green? # Green water in the aquarium

What should be done so that the water in the aquarium is not green?


Oddly enough, the larger the aquarium, the easier it is to care for it. The 150 aquarium will look very nice. just need to know from what the water can turn cloudy:
- overfeeding - the fish should eat writing for 3-5 minutes, the surplus will have to be caught with a net.
- an excess of natural light - the aquarium should be located near the wall in the middle of the room. , and in general the lamp should work 8-10 hours.
- biological imbalance - when there are a lot of fish, and forgive, they cocoa a lot.
- the water becomes cloudy one day after it has been re-poured and this is normal.
- if the filter does not cope or you clean it incorrectly. Buy a filter for 200 liters. It will be necessary to wash it once a month in the water you leaked when you cleaned the aquarium, and not under running water, and especially not with soap.
It will be necessary to clean the soil 1 time in 1-2 weeks, replacing at the same time 1/3 of water, top up the sediment! or processed specials. air conditioning.
In general, of course, experience comes with time. You will succeed!


It is in the small aquariums the water quickly turns green! Buy more snails (they are harmless), fish and a minimum of algae! Let the algae be artificial. In no case do not add salt - think about what will happen to the inhabitants of the aquarium! Yes, by the way, plus a filter is needed!

Anna Rybakova

Firstly, it is necessary to completely exclude direct sunlight from the illumination and generally intense natural light — the optimal illumination is diffused natural light plus artificial illumination, then good oxygen saturation of the water — either a compressor or more green algae or both, and then snails, then the bottom of the aquarium lined with a mixture of RIVER PEBBLES and sand not less than 3 cm thick — under these conditions the blue-green algae (and they "turn green the water and walls of the aquarium) do not develop water in the aquarium always remains I clean and possibly dostizhdenie ecological balance in which water can not be changed over the years - just add as evaporation And fish of course be present in this ecosystem.!

Vasily Kovalkin

- Filter.
- Siphon.
- Magnetic glass cleaner.
- A conventional wiper with a blade.
- Change of water.
- Snails and Somiki.
- Smaller feed.
It is important that the aquarium does not get direct sunlight, because the aquarium is green due to the small green algae that form when the sun is active, the aquarium "blooms".
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it is necessary to create conditions of a similar nature.
for example snails they hunt and felt water.
various algae.
filter and t d (replace groundwater)
if you make all the same as in Mother Nature, water in general can not be changed and it will be clean.

Why is the water green in the aquarium?


Thoroughly clean the bottom of humus, change half of the water and throw a good bunch of roquilla or a small pemphigus on the surface. Due to the rapid growth (the rodentweed can grow up to one and a half meters per week) excess nitrogen will be removed from the water, due to which an explosion occurs in the reproduction of unicellular algae, the so-called. water bloom. Plants goes without saying
must be taken from aquariums and not in any way in natural waters. In the future, do not forget to thoroughly clean the bottom and replace the water. And another thing: the light in the aquarium should be only artificial, at the rate of 0, 5 watts of fluorescent lamps per 1 liter of water, the length of the day should be at least 12 hours. Avoid sunlight.

User deleted

Wash the tank thoroughly before use, without using any detergent. Sand repeatedly washed and calcined in the oven. Cover it with the bottom of the aquarium obliquely (at the front wall with a height of 3 cm, at the back - up to 6 cm). You can place multi-colored sea pebbles on top of the sand, also pre-boiling them in water. Put a sheet of clean thick paper on top so as not to erode the sand when pouring water and fill the aquarium to a height convenient for planting. Defend the water during the day and filter. If possible, take a portion of the water in a clean natural pond and filter too. Such water will help establish a biological balance in the aquarium. Carefully plant in the sand the simplest aquarium plants - vallyseria, hornolistnik, water fern.
The walls of the aquarium quickly covered with simple algae, but it is desirable to clean only the front sight glass: algae are the most valuable suppliers of oxygen.
Sometimes, as a rule in summer, with good lighting and high temperature, the water in the aquarium turns green. The old, proven way to combat blooming and bacterial cloud is to launch daphnids or tadpoles into an aquarium. During the day the water in the aquarium will be crystal clear. After doing the work, do not forget to release the tadpoles. Specially selected homeopathic preparations help to establish biological balance in an aquarium.
Plants are not only a source of oxygen and pleasing to the eye. They are an excellent vitamin supplement for some species of fish. Fish, in turn, provide plants with nitrogenous compounds.
In order to stabilize life in the aquarium more quickly, it is best to place it near a window against a wall perpendicular to it, but not on a windowsill.

Natalia Kharlamova

Most likely, your aquarium is under the influence of sunlight. or use ordinary incandescent lamps for lighting or in the aquarium a very warm water temperature, which can also lead to a flowering of the aquarium. Try to change the water more often (on average it is necessary to change 1/3 the amount of water once a week).