The stealth RO 300 is a customised reverse osmosis water filter that can reduce up to 99% of most contaminants. This system is designed for use with hydroponic or horticultural applications. This system is built to give a maximum amount of flow from the membrane while sending less wastewater to the drain compared to similar RO filters. It produces up to 300 GPD (gallons per day) of ultra-pure, low PPM water and removes 98%+ of all contaminants from tap water. You can choose from a 1:1 or 2:1 waste to product water ratio (both included with unit) and it has a membrane Power Flush Kit now included. We now have updated packaging for maximum protection at the same great price as previous model! The #1 selling filter in gardening and hydroponics for 10+ years.