PH PERFECT SENSI GROW PART A Now You Can Make Sure Your Grow Phase Gives You Lush Green Plants Your plants use the ingredients in pH Perfect Sensi Grow to reward you with rapid growth lush foliage and sturdy structure. That's why you're using Sensi Grow the consistent two-part base nutrients formula that works well in the most productive hydroponics gardens. If you follow the label directions pH Perfect Sensi Grow Part A will keep the pH of your nutrient solution stable within a range optimal for nutrient uptake for one week. For optimal results we recommend using reverse osmosis (RO) water or water up to approximately 100 ppm (EC 160 ‚âà√≠‚à´S/cm). This product is specially designed for use with diverse hydroponic growing media including peat rockwool and expanded clay pellets and all continuous liquid-feed growing systems such as aeroponics drip irrigation and emitters NFT flood and drain and deep water culture. And since it also contains our proprietary pH Perfect Technology eliminating the need for pH and ppm metering pH Perfect Sensi Grow Part A is an invaluable asset to your growroom.