I would get a BRS 75gpd 5 stage plus. I got the base 4 stage and have since upgraded to 6 stages with a dual DI canister set. I also added the dual inline TDS meter so if I did it over again I would have bought the 5 stage from the beginning.
I use the Bulk Reef Supply 4 stage 75 GPD RO/DI with the dual inline TDS meter and pressure gauge. With the dual TDS meter and pressure gauge, I can tell when exactly what filter needs to be changed...so I don't use redundant filters.
Why 75GPD? It's one of the most efficient membranes out there, and the replacement filters are inexpensive.
Edited by ReefdUp - October 04 2013 at 5:02pm
www.reefdup.com Diving since 2009, reefkeeping since 2007, & fishkeeping since 1987 200g, 75g, & 15g Systems PADI Advanced Open Water
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