GrowMax Water RO System Power Grow 500 (150 GPD)The GrowMax Water Power Grow 500 Reverse Osmosis System filters up to 150 gallons per day of low EC water. GrowMax Water Reverse Osmosis Systems increase the effectiveness of your nutrients and fertilizers helping you grow healthier, higher yielding plants, flowers, gardens, fruits, and vegetables. Adding a GMW Filtration System to your garden will help strengthen plant roots and protect your soils beneficial bacteria. Easy replacement of our