I've never posted before, but I have consulted your forums before for info. I've a 55g tank that is roughly 5 years old. I have some fish that have been with us since we set up the tank. However, over the last few weeks we've lost a number of fish. We lost an entire school (5) of green barbs, 2 clown loaches, 2 kuhli loaches, 1 swordtail and a couple of neons. Now this wasn't all at once, just one-by-one over the last month. Some of the fish were quite old and their time simply may have been up, but we've never lost this many so close together before. In addition, we recently restocked the neon school, and 4 have already disappeared - no bodies found - within 2 days.
Currently the tank contains 1 blue gourami, 4 head-tailight tetras, 2 glass tetras, 2 danios, 4 neons, 3 clown loaches and 1 pleco. The water levels seem fine, save that the nitrates are a bit high, but I can't seem to bring them down and my understanding is that this won't kill off fish, although it may stress new fish. I do 10-15g water changes about once a month.
I'm at a loss. One of the clown loaches was really chasing the barbs, but it seems unlikely that they were doing any real damage. There is no sign of disease. Any help would be most appreciated. Thanks.
Currently the tank contains 1 blue gourami, 4 head-tailight tetras, 2 glass tetras, 2 danios, 4 neons, 3 clown loaches and 1 pleco. The water levels seem fine, save that the nitrates are a bit high, but I can't seem to bring them down and my understanding is that this won't kill off fish, although it may stress new fish. I do 10-15g water changes about once a month.
I'm at a loss. One of the clown loaches was really chasing the barbs, but it seems unlikely that they were doing any real damage. There is no sign of disease. Any help would be most appreciated. Thanks.