If you have a stable sump it's a great skimmer, mine wasn't stable enough to make things work well.I did have it in a basement sump, so height wasn't an issue.If I don't move both tanks, might be able to do a partial trade. I was going to make the 300 the new FOWLR, but decided to see if I could generate a sale. If I get to low in price, i'll keep it and do that. Might need some lighting for it. I go have 4 400 MH on the reef tank, and the ballasts do go bad, so will see.