White spot disease. The whole body of the rocket hanger seems to be covered with a layer of white film, the mucus increases, the body color is dull, the fish body is thin, loses vitality, and the swimming is slow and often sluggish. Or floating on the water, or living in a group, loss of appetite, accompanied by bleeding spots on the body, and likes to rub and itch on aquatic plants, fish tanks, etc.

First, raise the water temperature to 30 degrees. Then use drugs: 1. It can also be soaked in 5% saline for several days. 2. Or use two parts per million (2ppm) methyl blue solution, soak for 6 hours a day. 3. Mixing treatment with 0.05 parts per million (0.05ppm) malachite green and 25 parts per million (25ppm) formaldehyde solution has better curative effect.