Flow, Flow, Flow..stability,stability,stability..... The main thing with SPS is the right parameters with stability. As starters: Alk at 9-10, Calcium at 450, Mg at 1350-1500, RO/DI at 0ppm, Phosphates at.02 min., temp at 77-80, Nitrates and Nitrites as low as possible. Get a good skimmer(oversize it as a lot of SPSers do). I would get good test kits and recommend: Lamotte for KH, Elos for Mg, Elos or API for Ca. Either dose for Ca,ALk, and Mg using dosing pumps or get a Ca reactor or setup Kalk reactor(or drip). I test at least once a week for Ca,Mg,Kh. Invest in a refractometer. I run carbon and GFO thru reactors. Look up BulkReefSupply.And most of all... read,read,read-chemistry and sps threads. RC is a good place to get ideas.