If I can offer one piece of advice, it's don't add corals until your rocks have reached equilibrium and the po4 has stabilized. This will make your life so MUCH easier. Dump a good amount of po4 in your system, keep lights low, add a CUC when you see algae, and wait, otherwise you will be having to test everyday in order to keep it at an optimal level for your corals.I was told by some that dry rock actually leeches PO4 in a new tank as opposed to absorbing it. Not sure what to believe although I have been dosing NeoPhos and testing PO4 and dosing isn't raising the PO4 level. It's staying at 0.00-0.01 every test.