Normal, they are floating objects that cannot be absorbed by the filter cotton. They are usually a mixture of food residues, excrement residues, and smiling dust. They do not float or sink, and can float with a tiny flow of water. Just add a few more layers of cotton to the filter.
Although the filtration equipment in the fish tank can filter fish feces, food residues, etc., the fish tank, water fixtures and filtration system must be cleaned frequently, and the garbage in the fish tank should be cleaned up in time to avoid pollution and affect the fish. and human health. ?
Pay attention to indoor ventilation and purification. Households with conditions can be equipped with air purifiers or air exchangers.
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There must be dechlorinated water, otherwise if you add tap water directly to fish, the fish will not survive for three days, because tap water There is also chlorine gas, which is poisonous. Dechlorinated water has the effect of removing chlorine from the water and killing bacteria in the water. When changing the water, add two drops of dechlorinated water, mix well, and put the fish into the tank.
When changing the water, do not change it directly to tap water. You can use another fish tank or something that can hold water to connect it to the tap water first, and then leave it for 24 hours. It is better to put it under the sun. Pay attention when changing the water. , you cannot pour out all the original water, just replace about half of it.
If it is a small room, some small tropical fish can be raised, and large fish can be raised in an office, living room or larger room. At the same time, the breeding density and food amount of the fish must be controlled to avoid excess food contamination. fish tank.