My friend gave me four golden fish and a big fish tank. But after two month, these four golden fish all died. I don't know why. I usually have them in the temperature about 22-25C. Feed them once a day, usually at night. I think it maybe is infected by some virus or bacteria. Because after the golden fish died, we found that their tails all are damaged. At here, I ask for some having experience why? . B ~8 X X! r# d6 t# Q7 @$ xThank you very much.1 ^4 W$ _9 @3 o2 e) G. Y