LiquaGen - 6 Stage Reverse Osmosis + Deionization (RO/DI) Water Filter System w/Glycerin Filled Pressure Gauge - 100 GPD This product is great for aquariums, laboratory testing, and other applications where ultra-pure water is necessary Includes a Manual Flush Kit for Easy Installation & Maintenance Standard 10" Filters : 5 Micron Sediment Block, 5 Micron Coconut Carbon Block, Granular Activated Carbon (GAC), Reverse Osmosis Membrane , and 2 Inline Deionization Cartridges Reverse Osmosis (RO) Membrane Capacity : 150 Gallons Per Day (GPD) Pre-Assembled System