Hi.
I have a 200 litre mbuna community tank but I am having some difficulties. I have lost two beautiful fish in the 2 weeks. The symptoms are as follows. The first fish died about 2 weeks ago. One minute he was healthy. The next he started eating less and less untill he stopped completely. He then died after about a week. I have lost another today with the exact same symptoms. They did not have bloat and did not lose any noticable weight. The water parameters are fine. 27c nitrite 0, ammonia 0, ph 7.6 nitrate 30ppm before weekly water change 10ppm after. There are 12 fish altogether. Tank is filtered with a fluval 205 external and 2 internal filters. There was no sign of physical ailments or injuries. Another now seems to be coming down with the symptoms to. So it looks like it is contagious. Please help.