Self-purification of water in natural aquatic ecosystems occurs due to physicochemical and biological processes involving hydrobionts: living organisms and plants. The condition of the aquarium water depends on the organization of the system (maintenance mode, power and type of filter, the presence of living plants, driftwood, the number of fish and feed). Water can change color under the influence of various factors. So, the low oxygen content in it, spent on the oxidation of organics, leads to an increase in the concentration of decay products. Water becomes turbid, takes on the smell of hydrogen sulfide. But there are often cases when it acquires a green color. So why is the water green in the aquarium?
The reason for its turbidity is the massive multiplication of bacteria, and the water turns green usually from the green microscopic
euglena algae multiplied in the aquarium
. Normally, Euglena is always present in the aquarium, but when it multiplies, the “bloom” of water begins, which can turn
yellow-green or green . More often this is observed in aquariums with excessive brightness of the light source. Often lovers of ornamental fish, buying aquariums for the home, place them in the most convenient and "cost-effective" place - near the windows. Direct intense sunlight contributes to the active propagation of
green algae in the water
, which cover the aquarium glass, scenery, plants. Strong
artificial lighting also contributes to the reproduction of euglena. It can be brought into the aquarium with live food for fish from natural reservoirs.
The first actions that are taken by beginner aquarists are a complete replacement of water, cleaning plants, and decorations. Similar, logical at first glance, events only exacerbate the situation, causing bewilderment and the question of why the water turns green in the aquarium, despite all efforts.
Changing water does not improve the situation. It is necessary to eliminate the causes of its “flowering” - turn off the light for several days, obscure the aquarium, which is not far from the window. After this, the situation will be corrected by regular water changes and soil cleaning, since light and nutrients only stimulate the growth of green algae. It is necessary to monitor the cleanliness of the aquarium constantly.
You should know that the process of water self-purification will be accelerated when “old” water (1/3 of the total volume) is added to the aquarium, pre-stored, 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, not overpopulated with fish, with well-growing plants.
In order not to wonder why the water turns green in the aquarium, you can run Daphnia into it. In this case, it is better to plant fish so that they do not destroy the crustaceans.
You can also purify water 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.
Special diatom filters and UV-sterilizers help eliminate water “blooming”.
In order to no longer wonder why the water turns green in the aquarium, 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 aquariums are installed. Fish will feel great with proper lighting, proper feeding, aeration and filtering.
It is useful to acquire new inhabitants of the underwater world, eating algae. These are pterigopychlids, ancytruses that remove plaque from glasses, mollies, Siamese algae eaters, Japanese shrimps, snails-ampoules.