Hi, i wonder if you can help. I have a red cap fantail who is ill. It stated that i noticed after swimming he would float straight to the top of the tank. The next day the other fish kept nibbling at his fins (black moor,2 red caps). He then started floating in the tank alot. Ive seperated him now to a seperate tank. He is floating upside down. Doesnt eat food. Ive given him some treatment for his fins can you advise anything else? Does he have a bladder infection? The tank he came from is very clean with good filter and partial water changes once a week. Any help or comments would be much appreciated. Why do they nip his tail? Will it grow back?