Enteritis. There are no obvious symptoms on the body surface of the diseased fish in the early stage. After careful observation, it can be found that the diseased fish is sluggish, stops at the corner of the tank and does not move, and the body muscles twitch for a short time and do not eat. Turn over the abdomen of the sick fish, and the anus can be seen to be red, swollen and congested, and in severe cases, ulcers until death.

Treatment: Dip the sick fish with 0.2 g of nitrofurazone powder, and the fish can gradually return to normal after 2-3 treatments. Dissolve 2 tablets of dysentery in water, the effect is very good after 1-2 times of administration.

Or put 3--5 tablets of oxytetracycline in the aquarium , It has a certain curative effect after a long-term medicated bath with low concentration. It may be caused by eating unclean things, pay attention to the usual feeding.