HydroLogic - micRO 75 Reverse Osmosis FilterIn Store Location: @I3 An economical, entry level, micro sized, portable reverse osmosis system. Includes KDF85 carbon filter and 75 GPD membrane, perfect for hydroponic gardens requiring up to 75 gallons per day. Check out these exclusive features, nothing else compares at this price: Produces up to 75 GPD (gallons per day) 3 GPH (gallons per hour) of ultra pure, low PPM water (Flow rates of RO systems are based on source water @ 65 psi 77 500 ppm)