Growmax - Power Grow 500 R.O Filter Unit - 500 L/DayOverview Growmax Power Grow units are highly effective reverse osmosis that have been optimised for gardening and hydroponic uses. This powerful unit is capable of producing up to 500L day of pure water, eliminating up to 95% of all salts and heavy metals. The unit also eliminates 99% of chlorine and sediments down to 5 microns immediately. Benefits Produces pure water, leaving users with total control over their nutrient solution. How to Use For best