Hi all, This is my first request for help, but i really hope you can advise me. I have a Jewel Rio 180 planted tank and everything was going smoothly until I purchased 4 female golden honey gouramis from Osterly Maidenhead Aquatics... My current stocking levels (prior to the deaths) are 8 golden honey gouramis, 6 threadfin rainbows, 13 Harlequin Rasbora's, 3 ottocinclus and 3 amano shrimp. The tank has been set up for well over four months and it was fully fishless cycled prior to adding fish and I added bactinettes with the inital 13 rasbora's. Ammonia and nitrite have never been a problem. The problems only started within the last week, one of the gourami's were quite thin... Now mine were thin when I only had 4 of them, as they would very rarely come out to eat, it was due to what I think of them being timid and also the fact that the rasbora's ate everything as soon as it hit the water. But I purchased 4 more (all female to stop harrassment of the other two females) from Osterly and I think that they have brought a disease into the tank. The thin gourami got thinner, to the point where I could see his heart just behind his eye and he just sat on the bottom of the tank, in the mean time I lost one rainbow. There were no physical signs of disease. I looked at all the fish closely and another one had fungus. I went to Osterly and they advised that it sounds like worms, with the fungus being a secondary infection, but the only medication they had was not suitable for my shrimp... I purchased some pimafix to treat the fungus and have been doing so for 4 days. During this time the sick gourami has died, the rainbow with the fungus has died, another two died and now tonight, I find another rainbow dead. Once again, I have been looking at them nightly for about an hour straight and I cannot find any physical syptoms of what is causing the problem. I perform 1/3 water changes weekly, I have dropped this from 1/2 water changes (I am a heretic that doesn't do EI he he he ) But I don''t think this has caused the problem. After the first death, I thought that it may be due to CO2 poisoning as I had bumped my CO2 up to 3bps and started dosing easy carbo as I found some algae forming, but I have stopped the easy carbo, dropped my CO2 back to 2bps (drop checker is light green as opposed to yellow) and they are still dropping off like flies. Can anyone pls suggest a remedy? I am worried i'm going to loose all but my rasbora's. Thanks in advance. Justin.