What medicine is used for black-backed butterflyfish to get sick:

1. Fin rot: The cause is bacterial infection due to poor water quality . The fins of the black-backed butterflyfish are rotten, and the skin is dry and dull. Sometimes, it may also be because the black-backed butterflyfish bite each other, and the fins are damaged and infected with bacteria.

Control method: 0.02 g of nitrofurazone powder can be selected, dissolved in 10 kg of water, and immersed in black-backed butterflyfish for 10 minutes. You can also choose 3-5 pieces of furazolidone, dissolve in 100 kg of water, and soak the black-backed butterflyfish for 20-30 minutes. Or choose 5-8 tablets of oxytetracycline, dissolve in 100 kg of water, and soak the black-backed butterflyfish for 30 minutes.

2. Enteritis: The pathogen is Aeromonas punctata, which is caused by the black-backed butterflyfish eating unclean food, or overeating and indigestion. The black-backed butterflyfish lay still at the bottom of the tank, did not feed the bait, the feces were milky white, and the anus was red and swollen.

Prevention and control methods: 2 pieces of furazolidone can be selected, dissolved in an aquarium of 80x50x40 cm, and it can be recovered after multiple treatments. You can also choose 0.02 g of nitrofurazone powder, dissolve it in 10 kg of water, and soak the black-backed butterflyfish for 20-30 minutes.