Koi body black how to return a responsibility, how to treat

Too many bacteria: Koi may be blackened because there is too much bacteria in the water body. At this time, you can change the water in the fish tank and add a certain amount of crude salt to the fish tank. High nitrogen content in water: It may also be because the filter system in the fish tank is broken, resulting in high nitrogen content in water. At this time, it is necessary to replace the filtration system and treat the excrement in the fish tank. Genetic factors: It may also be because of genetic factors, so don't worry about it at this time, and this situation won't hurt them.

1. Too many bacteria

1. Reason: When the water body is unclean, bacteria in the water will multiply in large numbers, infecting koi fish and making them sick. At this time, some koi carp will be found to be blackened

2. Treatment method: fish out the sick koi carp and put it in clean water, and put low concentration potassium permanganate in the water for medicated bath. Then replace a quarter of the water in the original fish tank, add crude salt to the water, adjust the concentration of salt in the water to 1%, and sterilize the original fish tank.

2. The nitrogen content in water is too high

1. Reason: When the power of the filtration system is too low or the filtration system is damaged, it is difficult to clean up the feces excreted by koi fish, which will lead to an increase in the nitrogen content in water and lead to their blackening.

2. Disposal: Check that the filter system is not damaged, if it is damaged, repair the filter system, and if it is not damaged, replace the filter system. Then clean the feces in the fish tank to avoid harmful gases produced in the feces, which will cause harm to koi fish.

3. Genetic factors

1. Reason: If one parent fish has a black body, the born koi fish will have the same black body traits as the parent fish.

2. Treatment method: First, check the water quality to see if koi fish is sick due to poor water quality. If not, it is genetic. Don't worry too much about this situation. Black body caused by genetic factors will not harm them.