PH PERFECT GROW Lush Sturdy Growth From 3-Part Base Nutrients Designed Specifically For Your Plants When you use 3-part hydroponics base nutrients you get reliable flexible concentrated nutrients that give your plants the essential elements they need. Mix Advanced Nutrients pH Perfect Grow with pH Perfect Bloom and pH Perfect Micro to provide nitrogen phosphorus and potassium (along with secondary and micronutrients) that create nutrient healthy structure vital metabolism and productivity in your plants. If you follow the label directions pH Perfect Grow 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 Grow is an invaluable asset to your growroom.