GrowMax Water Mega Grow 1000 Reverse Osmosis Water Filtration System, 300 GPDReverse Osmosis System For Hydroponics & Gardening Five stage RO system designed and engineered specifically for indoor hydroponic growers and outdoor growing. Eliminates up to 95% of salt and heavy metals and up to 99. 9% of chlorine. Low EC water = more nutrients for your plants! The MEGA GROW 1000 Garden Reverse Osmosis water system is capable of reducing up to 99% of most contaminants. This system is designed for use with hydroponic or garden