So, if I'm using 60lbs of Pukani (give or take), with some rubble in my sump and the marinepure block...you're saying the excessive denitrification will lead to cyano? I thought the object was to have enough biological filtration, and that you can never have too much. Since my tank is cycling, I have no corals, should I take my marinepure block out? That said, I should have enough flow going on with the bare bottom setup to keep cyano from forming, but not something I really want to battle either. I have read this thread from 1 to current today at work. From what I gather: Calcium 400-450 Alk: 8.0-9.0 dkh pH 8.1-8.3 Mg: 1350-1400 Nitrate: 0.5-1.5ppm PO4: 0 (though there's other PO4 we can't test for) Salinity: 1.025-1.026 Questions I need to ask about my actual setup: Should I split my return into 2 lines while it's vacant and empty at the moment? Leaning toward no, but I know so very little. My Fritz RPM Salt mixes up at 8.5 dKH, 420-425 calcium and 1350-1400 magnesium. I'm thinking these should be the numbers that I eventually dose to. the plan is to stock the tank with fish, and maybe October/November get 1 or 2 SPS frags (ie: Monticap, and a Green Slimer). Hoping to have my 6x80W T5 with 2 Blue+, 2 Actinic, Coral Plus and Purple+ set up by then too. Would like to get some Zoa's for the bottom of the tank and create a zoanthid garden, and they actually may be added to the tank long before I get any sps frags, perhaps a few weeks after I re-introduce my clowns. that's my plan. Feel free to amend, advise, whatever else I'm sure I'll ask about 500 more questions as I get closer to adding the sticks.