Hey all, have a few questions. LFS store where I live has me going this direction. 55 gal. FOWLR. 3" aroganite and live sand. A CPR Aqua-fuge Refugium with built in protein skimmer. Makes sense to me, LR and the Refugium will naturally remove nitrates. Right now I am in Phoenix AZ. and stopped by the recommended LFS. I told them my plans for the setup and they thought it sounded good, but ! They ask where was the mechanical filtration ? I said it never came up so I thought I must not need it. Help !!!!!!!!!