by DanRad on Thu Nov 15, 2007 9:54 pm
Hi, Will: I'm of course not there looking at the fish, but one "rule of thumb" a lot of people go by is that there isn't too much that changing water won't at least help. If your O is acting as sick as you say, a 20% change just isn't going to do much. Another truism is that a water test kit is one of the best investments you can make. They don't cost a lot, and can give you a lot more specific (and quick) info than you'll get from almost any pet store. "It's all fine" really tells you nothing that will help you diagnose what's going wrong.
How are you cycling the new tank? With fish, or without?