GrowMax Mega Grow 1000 RO FilterGrowMax Mega Grow 1000 RO Filter Want to boost plants' growth? Control their diet! Use a GrowMax RO filter! Your filter will eliminate almost all water impurities! You'll get a more efficient nutrient feed and a more stable pH while enhancing nutrient uptake harmful Chlorine is removed. If you're growing in soil, healthy bacteria and microorganisms will thrive (again, no harmful chlorine). Overall, you should get more developed plants, healthier