The water in the aquarium turns green


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 the flowering 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.

In the aquarium, the water turns green - what to do?

For domestic aquariums, turbidity and blooming of water are characteristic phenomena. The reason that the water in the aquarium turns green and grows turbid is very often the green microalgae, which, under conditions favorable to them, actively proliferate, this is facilitated by an excess of light.

And why is the water in the aquarium without algae turning green? This leads to the wrong location of the aquarium, it should not settle down in the place where there is an excess of direct sunlight, this leads to an increase in water temperature, and as a result, it is not flowing, stagnant water quickly turns green and blooms.

Rules for dealing with spoiled water in an aquarium

We have already understood why the water quickly turns green in an aquarium, now we will learn how to eliminate it. First of all, to exclude too strong lighting and exposure to sunlight. It should be for a short time to darken the aquarium, at the same time, algae that contribute to the flowering of water, will begin to decline.

What else needs to be done if the water in the aquarium turns green quickly? Run into the aquarium "live filters", that is, organisms that feed on harmful algae. Shrimps, snails, catfish and daphnids contribute to the rapid purification of water from the negative state.

In the case of greening and turbidity of water, it is necessary to completely replace it and check the quality of the aquarium equipment, especially for filters.

You should also control the amount of food - if it is not completely eaten, then, settling in the ground, also leads to damage to the biochemical composition of the aquatic environment in the aquarium.

What else can you do if the water in the aquarium turns green? To do this, there are special tools that contribute to the destruction of protozoa. This can be streptomycin powder, diluting it in a small amount of boiled water, you need to enter into the water using aeration.

The water in the aquarium turns green during the day !! ! We change every day, and to no avail: (((What happened ??? How to cure water ???


In the summer, with strong aquarium lighting and high water temperatures, it can turn green. This is the result of the mass reproduction of microscopic algae, most often euglene green.
Sometimes microscopic algae also appear in large quantities in an aquarium, which cause whitish-green turbidity of water. And these algae develop under strong illumination of the aquarium.
When the bloom of water has not gone too far, it does not cause much harm to the fish, unless, of course, these fish did not suddenly fall into such water.
To get rid of the greening of water, the aquarium should be completely closed with a cloth that does not transmit light, or shade it in any other way. Keep the aquarium in this form should be to the clarification of water.
The second old, tried-and-true method of dealing with water blooming is as follows. A lot of daphnids are allowed into the aquarium: as many as the fish cannot eat quickly. And these crustaceans destroy algae: they feed on them. Only one day daphnia make the water crystal clear.
It goes without saying that a lot of daphnids can be released only in an overpopulated aquarium, since with a lack of oxygen the crustaceans will die, increasing the spoilage of water.
Water will not bloom in an aquarium if the wall of it, on which the sun's rays fall, is covered with rare gauze or a piece of thin white paper.
Often the greening of the water is not only due to the excessively strong illumination of the aquarium, but also due to the fact that too much organic residue accumulates at its bottom. If so, you must first remove them.
Green algae deposits on one or two walls of an aquarium, on devices that were in the water, on plants are usually harmless. As a rule, simply clean the glass of the aquarium with a scraper. And in order to avoid an excess of algae on plants and devices, fish are allowed into the aquarium, for example, some species of tooth-eating fish that eat them. A temporary shading of the aquarium or, if the artificial light is too bright, helps reduce the lamp power.
When green algae, rather than green algae, appear on glasses, appliances and plants, this indicates that the aquarium is lit very poorly. Brown algae usually appear in winter in aquariums devoid of artificial light.
In such aquariums and plants fall ill. Their leaves and stems turn pale, turn yellow, become thin, flabby, begin to rot.
To cure plants and get rid of kelp you can, putting the aquarium in the lit place, but it is better to install a lamp above it.
To the worst enemies of aquariums include blue-green algae. They multiply unusually quickly and inhibit the growth and the very life of plants, covering their leaves with a smelly film.
It is necessary to fight these algae as follows: clean the aquarium glass and devices with a scraper, carefully remove the film from the leaves of the plants with your fingers, and remove the dirt from the bottom of the aquarium with a hose with a hose. In addition, it is necessary to loosen the soil and put into the aquarium fish that feed on algae, they need to be fed moderately.
In addition to blue-green and other algae, filamentous algae often breed on the illuminated walls of aquariums and on the leaves of plants. If they are bred a lot, they may be confused and die small fish.
With filamentous algae, the following methods of control are possible: reduce the amount of light falling on the aquarium, settle as many snails of coils in it, put fish into it, eagerly eating yarn.
In a warm-water aquarium, these algae eagerly eat mollies with greed, and other viviparous fishes eat them, though not with such appetite.
In the cold-water aquarium, the redgrass is superbly destroyed by ruddies and bitters.
Many species of fish can be accustomed to eating yarn, however, provided that there are several mollies in the aquarium. Imitating them, the fish begin to eat algae.

Natalya Danilko

It is because you change the water every day and no sense. If this is a new aquarium, then greening is a normal process, a microcosm is formed in the aquarium, certain types of bacteria are diluted. We also had, it was difficult to breathe near the aquarium, the water was already muddy (this state was about a week, then brightened again, and so alternated a month and a half or two. Now the water is clear, there is no smell). Just once every 2 weeks it is necessary to add a little of the settled water, to look so that there is no direct sunlight, you can, of course, special. buy liquid, but we did without it. And do not pour food.

User deleted

You need (just inevitably) to clean the entire tank and the contents inside it. If you find real pure silver you can put it from the bottom, there will be no harm. Pour clean river water, it is still necessary to find clean river water! Good luck to you! The aquarium is very beautiful - it requires a lot of hustle and bustle. But beauty !!!

Alexandra Stepanenko

Do you put special bacteria in an aquarium? To create the right microflora and microclimate they are non-volatile. You need to put a bag of bacteria on the bottom of the aquarium and run the fish only a week later. Also in the pet store sold special fluids to suppress the growth of algae. When changing water, by all means take water from the bottom, use a special siphon for this ... Do not drain the upper and middle layers ...
Aquarium is great. You will succeed! Good luck to you!

Bell a morr

the first is to thoroughly wash the pebbles and the aquarium itself. the second is that the water should be left for at least two days. How tall are you? put an aerator (air supply compressor. it has a filter) and remove the aquarium from the light. do not feed the fish too often; it is filling up the aquarium.


If your fish blacken their noses (read in the comments), then in this case it comes from too frequent changes of water, and, perhaps, settled less than 3 days. Partial or total darkening occurs with chlorinated water. Sometimes the edges of the fins and tail whiten. That your fish have no diplomatosis and no other diseases, that's for sure. In this case, it is on the quality of the water. If you continue in the same vein, the fish will die. About silver (harm) I wrote in the comments to the answers about silver.
Many aquarists when cleaning an aquarium with a small capacity completely replace water in it, replanting fish and removing plants. This injures the fish and spoils the plants. Often you can hear the full disappointment statement: "The more often I change the water, the more it becomes cloudy." This is true.
In the newly equipped aquarium in the first few days the water may be muddy due to the strong reproduction of single-celled organisms. After the aquarium is prepared and filled with water, you should be patient and not rush into its “stocking”. As a rule, on the second or third day, the water in the aquarium becomes turbid, as if a few drops of milk were dropped into it, because after a complete replacement of water, after some time, microorganisms usually grow rapidly and the water becomes cloudy. from the trash particles, and from the ciliates, the so-called "infusor cloud" arises.
The rapid reproduction of bacteria can manifest itself in your aquarium every time you replace a large amount of water, and also in those cases when you forget to remove the remnants of uneaten food (especially dry), rotting plants from the aquarium in time. Such clouding, if you eliminate its cause and wait a while, passes.
In the aquarium constantly occur interrelated biological and chemical processes, as a result of which some animal and plant organisms are born, others die.
A huge mass of bacteria that lives in the water column and in the ground processes the decay products and the vital activity of plants, food remains, fish excrement. Bacteria in turn are food for ciliates, etc.
If you do not change the water to a new one, as many inexperienced aquarists do, fearing cloudiness, then after a week or two the bacterial turbidity disappears and the water becomes crystal clear.
In an overpopulated aquarium, turbidity in the water can occur, especially if there are few plants in it and the water is not blown or filtered. In such an aquarium, accumulated metabolic products serve as a good nutrient medium for the mass reproduction of bacteria and unicellular organisms. In this case, you need to quickly precipitate extra fish. If the situation is not corrected in time, it can lead to disease and even mass death of fish, not to mention that such an aquarium looks ugly.
The water in the aquarium can turn blue from the appearance of a large number of putrefactive bacteria in it, which are very harmful not only for fish, but also for aquatic plants. The reason for the appearance of such bacteria is improper feeding and overly dense landing of fish in the aquarium. For good filtration of water, coarse-grained, cleanly washed river soil with a layer of 4-5 cm should be poured into the bottom of the aquarium. A full change of water in the aquarium should not be carried out, it is necessary only with a hose with a tube periodically (every 3-4 weeks depending on the volume of the aquarium) remove dirt from the bottom and add fresh water of the same temperature in the amount of 1/3. A properly equipped and well-contained aquarium can stand for years without a general cleaning with a complete change of water. It establishes the so-called biological equilibrium. The rest of the time, add to the evaporated one and replace no more than 1/10 or 1/15 of the volume. The maximum rate of landing fish 2 - 3 pieces in size 3 - 5 cm in 1 - 3 liters of water.

Little pig

Maybe to start reading literature about aquariums ?? ? Why do you change EVERY day water? And changing every day where you take it from - from the tap ?? ? She does not have time to defend - 3-4 days it takes!


Do not change so often the water will not change anything, only worse for the fish will be, put the filter, I put the filter and bought special droplets for microflora. // look here.

the water in the aquarium grows cloudy and greener

The water in the aquarium turns green, what to do?

Makc RybaxuH

Proper care of the aquarium is in its periodic cleaning, care for aquarium water, soil, plants and its inhabitants.
For an aquarium of small capacity, weekly cleaning of the aquarium from the remnants of food and other waste products of its inhabitants is necessary. A large tank can be cleaned once a month. The bottom of the aquarium should also be cleaned at least once a month.
To clean the aquarium use a rubber hose with a diameter of 10-12 mm with a tip made of glass or metal. The length of the hose is about 1 meter. Aquariums small tanks convenient to clean with a siphon. Siphon is a glass tube with an internal diameter of up to 6 mm, which is connected to a rubber bulb. Dirt is collected from the bottom of the aquarium by pumping a pear with water.
With daily care of the aquarium, it is necessary to remove the remains of fish feed from it. If after giving the feed 10 minutes have passed, and it is not eaten by fish, then this means that the portion of feed is too large. Excess feed must be removed from the aquarium: from the surface of the water with a net, from the bottom of the aquarium using a siphon.
If the contents of the aquarium are not correct, the remains of fish feed will lead to turbidity of the water.In this case, with the help of a rubber hose and a siphon, it is necessary to collect debris from the bottom layer of water, where dirt mainly accumulates. Fish are not fed dry food for 2-4 days; the aquarium is purged with air. After such a cleaning of the aquarium, the oxidation processes cease and the water becomes transparent again.
The content of the aquarium depends on the season. For example, in the spring in the aquarium partially replace the water and make a transplant of plants. Autumn care for an aquarium consists in thinning out growing vegetation, removing weak and sick fish, cleaning the soil, pebbles, snags, setting up lighting and a thermostat. At such events, the fish must be removed from the aquarium. Therefore, it is necessary to have additional tanks in which it will be possible to temporarily keep the fish. In extreme cases, plastic bags are also suitable, but you cannot hold fish in them for a long time, as they can suffocate.
Cleaning the aquarium is a good time to change or update its “interior”. However, try to combine all the essential "rearrangements" in the aquarium with cleaning, as frequent fish transplants do not benefit. If you bought a new decorative item for the aquarium, then you do not need to replant the fish.

I do not know what to do ? the walls of the aquarium turn green !!!


1. there are special tools in the store from the flowering of water - you can use it,
2. Another problem arising from too high a temperature is water blooming. In warm conditions, microscopic blue-green algae multiply, and they can multiply favorably in soft and hard water. These same microalgae remain a lot of secondary problems in the aquarium world. In the course of their life, the concentration of hydrogen ions in water increases. Being in a suspended state in an aquarium, blue-green algae cover with a thin sticky layer all objects and all inhabitants of the aquarium, not excluding of course the fish. Aquarium bloomed. We have to thoroughly clean the aquarium and its inhabitants from this sticky misfortune. In natural conditions, despite that. that fish can move freely over long distances and choose convenient places with a suitable water composition, so-called “fish blockages” occur, and there is a massive death of fish from asphyxiation and carbon dioxide intoxication during intensive flowering of water in their habitats.
There are two ways to deal with the problem of water blooming.
The first is biological. It consists in the fact that a number of copepods - daphnids - are placed in an aquarium. These same daphnids simply eat up all the blue-green algae.
The second method is chemical. Penicillin, known to everyone, is placed in an aquarium, in the amount of 10 thousand U - units of action per 1 liter of water. After that, additional water doses of penicillin in the amount of 2.5 thousand units per 1 liter of water are introduced into the water. With this method of dealing with microalgae, the latter die within a week. Dead algae are removed from the aquarium with a glass tube or rubber hose.
The chemical method of combating water blooming is considered safe for the rest of the inhabitants of the aquarium: fish, higher algae and plants, etc.
There is another way to destroy the blue-green algae from the aquarium. A small amount of boric acid is placed in water - 3% solution in the amount of 1 ml per 1 liter of water. This method is also considered safe for the rest of the aquarium inhabitants.


- effective against blue-green algae ... TetraMedica GeneralTonic preparation of a broad action, promotes healing of wounds, protects the mucous membrane. Treatment in the general aquarium. 3-4 treatments h / z 5 days 5ml * 20l of water