Click to expand Tap to zoom General Hydroponics pH Down Liquid Save Liquid error (product-badge line 32): -Infinity% $11.73 Quart - $11.73 Gallon - $29.24 Quart Gallon Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart The acid formulation uses food-grade phosphoric acid to lower the pH to the proper level.
