1. Reason: Guppy suffers from needle tail disease, which may be caused by poor living water quality. Although they have low requirements for water quality, if the water quality is too poor, bacteria will easily breed in the water, which will lead to their infection with needle tail disease.

2, Solution: Breeders need to change their water immediately and turn on the filter to keep the water clean. If the needle tail disease of guppy is serious, the breeder should add some oxytetracycline to the fish tank.

1. Reason: Guppies suffer from needle tail disease, which may be caused by too high breeding density, and they grow faster. If they live in a narrow space for a long time, they are prone to needle tail disease.

2. Solution: The breeder needs to separate the guppies, then raise the water temperature to 25-28 ℃, and then oxygenate the fish tank. Finally, add a proper amount of potassium permanganate in the fish tank to make the water reddish.

1. Reason: The guppy suffering from needle tail disease may also be caused by too many nitrifying bacteria in the fish tank. Although proper nitrifying bacteria can make guppy grow more comfortably, there are too many nitrifying bacteria, and the bacteria are easy to attach, so guppy is easy to be infected with needle tail disease after approaching.

2. Solution: The breeder should fish out all the guppies first, and then clean the fish tank. Finally, use penicillin or furazolidone to give sick fish a medicated bath once a day for 7 consecutive days, and the situation of needle tail can be alleviated.