I used to have one, I just think that if you're gonna spend 100 on that, spend another 80 and get a Turboflotor in sump, he said he was working on home made sump, my home made sump is a 12 dollar rubbermaid container, I have a Turboflotor 1000 with the new needle wheel and it gets the dark thick STINKY stuff out...as good as a 600 $ down draft they have at the lfs....oh and I have 0 nitrates, and I do very little water changes and I don't have dsb...