the guppy may be suffering from Saprolegniasis. At this time, their body is white, and you will see them rubbing the white body on the water plants and stones to reduce the pain. In addition, they become less likely to eat and can see clumps of flocculent hyphae in the water.
Their white body may also be suffering from white skin disease, when they first have the disease, the end of their tail is white. With the aggravation of the disease, the white spots on the body will continue to extend to the body. In serious cases, it can even rot fish tails. It's also possible that it's just an albino species. This fish just lacks pigment in its body, which will not cause harm to them, so it doesn't need treatment.
guppies? If they suffer from Saprolegniasis, they can be treated mainly with two drugs. The first is coarse salt, which can be soaked in 3% coarse salt water for 5-10 minutes every day. Wait until they have recovered before putting them back in the tank. The second is malachite green, which can be prepared by dissolving 0.7 G of malachite green in 100 kg of water. Then put the diseased fish in it and soak it for 15-20 minutes until the mycelium disappears.
If you have white skin disease, you can dissolve a certain amount of chlortetracycline in water, and then give them a medicated bath treatment.
