1. Reason: This fish is easy to suffer from some germ diseases. Sick fish's physique is very poor, and their bodies may rot at this time.
2. Treatment: The diseased map fish were kept in isolation. Take them out of the fish tank, and then clean the fish with potassium permanganate solution. At the same time, put 1% salt water into the fish tank and change the water in time. It should be noted that the water should not be changed too much, and about one third of the fish tank water can be changed every time. The changed water also needs to be treated with trapped water, that is, fresh tap water needs to be dried for several days before use.
2. Improve the environment1. Reason: When the water quality environment changes suddenly, they may have a series of abnormal reactions. Generally speaking, they may not adapt and have a reaction of lying down. At this time, they don't eat, which leads to a decline in immunity. Slowly, their bodies may become more susceptible to decay.
2. Treatment method: adjust the water quality environment to their most suitable environment. First, fish them out of the fish tank, then clean their bodies with potassium permanganate solution, and finally adjust the water temperature to their most suitable temperature, that is, 26-28 ℃. When adjusting, we should adjust slowly, and we must not let the range of environmental changes be too large, so as not to cause stress reaction.