My wife and I have just started a new 10 G tank that I bought when I was 11 or 12. It is an old tank but it has gotten the both of us into the hobby. We are already wanting to buy up to a 75 G and we don't even have fish in our 10 G yet! Great forum: I think I may have already found an answer to our problem that we have been trying to remedy for 5 days now.