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?$ C6 j: d+ ~2 s/ V) R: U0 h' p( E
Thank you very much. , ^3 d6 a- i" _ ~; T# \0 P% J6 m
Xiaoxiao