I'm realy upset. Lost another fish today!

[Ghpr13]

Ever since I got home from my 4 week stay at the hospital, I had 3 fish die on me. First was my Dwarf Blue Gourami died on 4/01/12. His stomach was large, but just like it usually gets after he eats, nothing really unusual about it. Then my male Molly died about a week later. It appeared to have columnaris, along with my female Molly and my two Sliver Mollies. I treated the tank with Maracyn Two, and that cured my other Mollies. I then did 50% water changes the next two weeks. Got my ammonia back to 0ppm and Nitrate around 20ppm. Now, this morning, my Dwarf Red Gourami died. His stomach was large like my other Gourami, but again, not out of the ordinary. I had just feed them about 30 minutes before he died.

While I was in the hospital, there wasn't anybody to do my water changes, but as soon as I got home, I did a 50% change the next day. My parameters were a little higher than the should have been, but I kept doing the water 50% water change until I got them back in line.

My wife did add water as need to the tank, using Prime, but it just seems like I've lost control of my tank, and slowly losing my fish.

This is very frustrating for me. How can I continue to work on setting up my 75gl when I can't even take care of my fish in the 30gl?

BTW: I had all 3 fish that died from 6 to 8 months.

Ghpr13:(