General Hydroponics pH Down Liquid Premium Buffering For Stability, 1-Gallon Description The Acid formulation uses food grade Phosphoric acid to lower the pH to the proper level. Widely recognized as a consistent and reliable product. Features: Acid formulation uses food grade phosphoric acid Add when your nutrient pH is too high in order to lower the pH to the proper level Promotes pH stability Adjust by adding a little at a time Recommended pH for most plants is 5.5 to 6.5 pH Product Details: Brand: General Hydroponics Item Weight: 2 Pounds Item Form: Liquid Coverage: Medium Liquid Volume: 128 Brand: General Hydroponics Item Weight: 2 Pounds Item Form: Liquid Coverage: Medium Liquid Volume: 128 Target Species: Add when your nutrient pH is too high in order to lower the pH to the proper level Product Dimensions: 6 x 6 x 12 inches Item Weight: 2 pounds Manufacturer: Hawthorne Hydroponics, LLC Item model number: HGC722125 Is Discontinued By Manufacturer: No