the blackening of fish? The blackening of fish is usually caused by poor water quality. If you want to treat it, you should first change the water properly. Changing the water can not only improve the water quality, but also stimulate the fish. Proper stimulation is helpful to their recovery. In addition to changing the water, raise the water temperature and add salt to the water. If the fish does not recover, it needs to be treated with drugs, usually some insecticides are prepared to destroy the parasites in the fish.
? 1. If the temperature is too low, fish will turn black, which usually has a certain relationship with the temperature, especially tropical fish, which have certain requirements for water temperature. If the temperature is lower than 20 ℃, the body will be stimulated, which will lead to its blackening. In this case, the best solution is to heat up properly, but not too much in a day.
2, feed is bad: If the food that the fish eats for a long time does not have nutrition, also can cause it to fade, for example parrot fish can encounter such circumstance, explain the substance that lacks a few hair color inside body, want to improve actually very simple also, want to change the food that takes pigment only OK.
3. Deterioration of water quality: When the water quality deteriorates, the fish will also be stimulated, thus making the body color black. This situation is more common, and want to treat and prevent is also simple, as long as the usual attention to change water, improve the water environment, fish will soon be able to recover.
