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? $ b5 L0 G3 q! Z: g' BThank you very much. 4 C- X* j6 V# \, M5 | 3 S5 s* {: Q+ v* ~7 \Xiaoxiao