I have had a 75 gallon FW set up for several years now, it's gone through it's share of changes along the way. I currently have a 6in highfin spotted pleaco, three large balas, some tetras, cory cats, rainbow shark, etc. It used to have live plants, too many snails and the artifical plants now look really good! I'm running a marineland Emperor 400 for filtration. The only downside is moving it, which I'm going to have to do about a month from now.