What is a good way to experience the first hole

　　I dont know what it is.Acne because there is too much water.One bottle of medicine is not enough for the whole tank. Is there a similar way?

Baota District, Yanan City, Shaanxi Province
========How did the fish friends of the Xianglong Aquatic Alliance comment==
jaObw Yuyou said: Metronidazole?Erythromycin ointment (sealing effect)
天水养鱼人 鱼友说：大白片对头洞，效果不是很好，我试过，元宝凤凰，最后挂了，甲硝唑涂抹有用，但是不好涂，进水易化，涂抹时需要小心鱼，Wrap the towel and seal the medicine after wiping, otherwise it will disappear as soon as you enter the tank
Chinese Dragon and Tiger Fight Yuyou said: head cavity disease, caused by parasites, metronidazoleHow to judge the age of red dragon fish$How to choose the best red dragon fish"Super Scarlet Blood Dragon Fish VideoSuper Red Blood Red Dragon Fish:Arowana polyculture tips%It is best to keep a few red dragon fish@Blood Red Arowana Wallpaper Picture?Red Arowana Distinction Picture#The most expensive aquarium fish price ranking! Taizz Fish！What is a good way to experience the first hole！