PH PERFECT® BLOOM Ensures A Successful Bloom Phase With This 3-Part Base Nutrient For Your High Value Plants 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 - guaranteed! 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 (EC 160 ?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 Bloom is an invaluable asset to your growroom.