Steve u see my (150 gal.) b4, now is 220 gal. + 90 Gal. sump, I tell u you need to go bigger, reason # 1, "Greedy" not only me, you or most of the members, we keep add more Corals almost every week, months, in natural reef, water change is in seconds, minutes, I got 70 frags + many colony's, I just screw up my BioPellets, I use to have one old (in the tank) I removed to early, I start again , I go dif. now, I will run two (1/2 a way one) then anything go wrong (pump, strainer etc.) I still have the "back up" to avoid the PO4 go crazy, my goal is to got Rick "eyes" to monitor the tank dif. way , NOT to trust the Hanna egg, but will take me some time lol. I think I am in right direction.