Hydro-Logic® Stealth-RO300™ Reverse Osmosis SystemPerfect for hydroponic gardens requiring up to 300 gallons a day of pure reverse osmosis water. Produces up to 300 GPD (gallons per day) of ultra pure, low PPM water (Flow rates of RO systems are based on source water @ 65 psi 77 500 ppm) Removes up to 98%+ of all contaminants 50% water savings over similar RO filters with your choice of 1: 1 or 2: 1 ratios The #1 selling filter in gardening and hydroponics for 15+ years Membrane Power Flush Kit now