Why is the aquarium green and how to fight it?
Self-purification of water in natural aquatic ecosystems is due to physicochemical and biological processes involving hydrobionts: living organisms and plants. The condition of aquarium water depends on the organization of the system (maintenance regime, capacity and type of filter, the presence of living plants, snags, the number of fish and feed). Color water can change under the influence of various factors. Thus, the low oxygen content in it, spent on the oxidation of organic matter, leads to an increase in the concentration of the decomposition products. Water becomes turbid, gets the smell of hydrogen sulfide. But cases when it gets green color are not uncommon. So why is the water green in the aquarium?
The cause of its turbidity is the mass reproduction of bacteria, and the water usually turns green due to the multiplication in the aquarium of green microscopic euglene algae. Euglena is normally present in the aquarium, but when it multiplies, the "flowering" of water begins, which can be colored in yellow-green, green colors. More often this is observed in aquariums with excessive brightness of the light source. Often fans of decorative fish, buying aquariums for the house, place them in the most convenient and "cost-effective" place - near the windows. Direct intense sunlight promotes active reproduction in water of green algae that cover the glass of the aquarium, scenery, plants. Strong artificial lighting also promotes the reproduction of euglena. It can be brought into the aquarium and with a live food for fish from natural reservoirs.
The first actions that are undertaken by beginning aquarists are complete replacement of water, cleaning of plants, decorations. Similar, logical at first glance, events only exacerbate the situation, causing bewilderment and the question of why the aquarium water is green, despite all the efforts.
Change of water does not improve the situation. It is necessary to eliminate the causes of its "flowering" - turn off the light for a few days, shade the aquarium, located near the window. After this, regular water changes and soil cleaning will help to correct the situation, since light and nutrients only stimulate the growth of green algae. Keep an eye on the purity of the aquarium is necessary all the time.
It should be noted that the process of self-purification of water will be accelerated by the addition of "old" water (1/3 of the total volume) stored in advance, rich in humic acid and a set of microorganisms that help restore a healthy environment. You should know that it is harvested from a safe aquarium that is not overpopulated with fish, with well-grown plants.
In order not to wonder why the water in the aquarium is green, you can run daphnia into it. In this case, it is better to plant the fish so that they do not destroy the crustaceans.
Purification of water can also be done with the help of special preparations purchased at pet stores. Algae die off when a solution of rivanol, tripaflavin, penicillin, streptomycin is added to the aquarium.
Eliminate the "flowering" of water using special diatom filters and UV sterilizers.
To no longer wonder about why the aquarium is green, you need to achieve the necessary biological balance for your aquarium inhabitants. To support it, you need to adjust the lighting: apply curtains, screens, change the power of the lamps. Remember that it is important where the aquariums are installed. Fish will feel fine with competent lighting, proper feeding, aeration and filtration.
It is useful to acquire new inhabitants of the underwater world eating algae. These are pterygoiplichts, antsitrusy, removing plaque from the windows, Mollies, Siamese algae, Japanese shrimp, ampularia snails.