I've just got two acans frags & am lost as far as placement & do you target feed yours , & if so with what? I also wondered what to put it on untill I saw this thread, I've got a nice crocea shell for it. I've got a 120 gal, 2-250 (20,000) MHs,2-10,000 VHO's, & turn over about 10,000 gal hr.