The stealthRO customized reverse osmosis water filter removes 99% of total PPM and contaminants. Industry leading, cutting edge RO filters. Saves 25-50% more drain water compared to similar RO filters. Give your plants only the best water. Start with a clean base for your nutrient formula. Boost nutrient uptake and prevent lockout. Increases quality and yields. Comes with all necessary components in the box for super simple, quick setup.