If you want to make the water in the fish tank clear for a long time, you must install filtration equipment in the tank. Good filtration consists of two parts, one is physical filtration, which is mainly responsible for sucking away the dirt in the tank, such as residual bait, fish droppings, etc. Although there is no difference between decomposition in the filter tank and decomposition in the fish tank, at least the interior looks much cleaner. The other is biofiltration, which converts ammonia nitrogen into nitrate by nitrifying bacteria to prevent fish poisoning.

1. Change water in time: The first thing to do if the water body is turbid is to change water. According to the deterioration speed of water quality, the frequency of changing water is different, but usually don't change it too frequently, because it will cause certain stimulation to fish. It is better to change once every seven days, and change a quarter every time, not too much.

2. Reduce feeding: Usually, the turbidity of water quality is due to the increase of organic matter content in water, which leads to a large number of microorganisms, and the organic matter mainly comes from usual feeding, so controlling the feeding amount can also prevent the deterioration of water body. Usually, every feeding should be fed to seven or eight minutes full to avoid residual bait in the water.

3. Pay attention to avoiding light: If the light is too strong, it will also increase the growth and reproduction of algae, and once the algae erupts, it will also make the water body turbid, so avoiding light can prevent algae explosion. If algae have exploded, some algae-eating fish should be raised for cleaning.