The puffer fish is white with water mold, and there are cotton-wool hyphae on the surface of the fish, which can be covered all over the body in severe cases. The sick fish is restless, swims abnormally, loses appetite, is weak and dies.

White spot disease, generally white spot disease can be treated with the old three kinds, that is, changing water and adding salt, but the boat is soda fish, and the old three kinds have no effect on it, so to use medicine, mercurous nitrate can be used. The effect is obvious, just take a bath in proportion 1-2 days.