Black Magic 8 fl. oz. pH Down - Premium Buffer to Lower Nutrient Solution pH, Concentrated Acidic Formula 10101-10006 - The Home Depot

Viagrow pH Up and Down Control and Testing Kit VLPTK4 - The Home Depot

Black Magic pH Up 8-fl oz Hydroponic Plant Food at

Viagrow pH Up and Down Control and Testing Kit VLPTK4 - The Home Depot

Black Magic pH Down 8-fl oz Hydroponic Plant Food at

Black Magic 8 fl. oz. pH Down - Premium Buffer to Lower Nutrient Solution pH, Concentrated Acidic Formula 10101-10006 - The Home Depot

Black Magic 8 fl. oz. pH Up - Premium Buffer to Raise Nutrient Solution pH, Concentrated Base Formula 10101-10004 - The Home Depot

Best Buy: Black Magic pH Down Orange 10101-10006A

HTH pH Down helps balance the pH in your pool water for healthy swimming. Test your water weekly to make sure pH is between 7.2 and 7.8 ppm. If pH measures above 7.8, add HTH pH Down directly to the pool water to decrease the pH, prevent corrosion of pool surfaces and prevent skin and eye irritation. HTH pH Down is great for all pool types including vinyl-lined pools and salt water systems.