I have had my 10 gallon, fresh water tank for approximately a year now, but it seems that no matter what measures I take I am plagued by disease. I understand this is generally a sign of a water quality problem, but I've tested the water myself, as well as brought it to fish stores, and everything SEEMS to be fine.
I have an ammonia & pH test kit, but have had the nitrites/nitrates tested at fish stores during times of problems and there never seems to be a problem. I am particularly determined to find the problem SOON, so anyy advice on what i'm doing wrong is greatly appreciated.
My filter is "Aqua-Tech Power Filter" and i change the filter cartridges approximately every four weeks. I've been using "API Stress Coat+" to get rid of the chlorine, though I don't have a test kit for it, i imagine it does it's job. I also add some salt, since my tank has only mollies. I keep the temperature at 78F, there are no live plants, little algae, plenty of plastic plants and places to hide.
I don't mess with the pH, because I tried it once a long time ago and it just reverts back to normal in like a day. I suppose I would have to buffer it, but I read online it's best just to not mess with it. Therefore, my pH remains at aprox 7-8. I live on Long Island, which I believe has relatively soft water. When I clean the tank I usually try to do it once every two weeks, and really try to get the stuff out of hte gravel as much as possible.
I guess thats about it. Any idea what I'm doing wrong??