I am new to reefing and just joined, but I thought I would share progress. My goal is to build out a Red Sea Reefer 170 with modifications to run it on the Triton method. I am new to salt water so this is going to be a journey. First up is RO/DI. Got the 7 stage BRS system. Awesome but I now fear overkill as I'm 0 TDS after the first set of 3 filters. I guess the water can never be too clean. Lucky that I have a frost free water source that is before pressure reduction to the house. It has 100 psi pressure, so I can feed 100 psi to the RO/DI. I figured out I can close the input valve a bit and dial in optimal pressure. 80 psi makes water like a charm.