When you mix Advanced Nutrients pH Perfect Bloom with pH Perfect Grow and pH Perfect Micro, you get 3-part base nutrients that provide bud-building potassium and phosphorus combined with other elements to give you vigorous growth and a happier harvest day. If you follow the label directions, pH Perfect Bloom 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. 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 Bloom is an invaluable asset to your growroom.