Nitric Acid pH Down for Hydroponics & Fertigation

Manage irrigation-water alkalinity and nutrient-solution pH with nitric acid pH down for commercial hydroponics and fertigation. Nitric acid neutralizes bicarbonates while contributing nitrate nitrogen, making it an option for hydroponic lettuce, leafy greens, and greenhouse crops when that nitrogen fits the fertilizer program.

pH adjustment that fits your nutrient recipe

Acid selection affects more than pH. Nitric acid adds nitrate nitrogen without adding phosphorus or sulfur. Include its nitrogen contribution when balancing your base fertilizer, particularly in recirculating lettuce and leafy-green systems where repeated acid additions can affect the nutrient balance.

67% nitric acid in practical package sizes

Our 67% nitric acid pH down is available in individual 1-quart bottles, 1-gallon jugs, and 5-gallon containers. Its guaranteed fertilizer analysis is 14-0-0, with nitrogen supplied as nitrate nitrogen. Choose the package size that matches your treatment volume and handling setup.

Calculate acid demand from water alkalinity

Use a source-water analysis and a target residual alkalinity to plan acid treatment. Starting pH alone does not establish how much acid is needed. The AlkCalc irrigation water acid calculator can help estimate acid requirements and nutrient contributions. Confirm the acid concentration used in the calculation and verify treated-water and final nutrient-solution pH with a calibrated meter.

Professional handling

Concentrated nitric acid is highly corrosive and an oxidizer. Follow the product safety data sheet and use compatible handling and dosing equipment. Always add acid to water, never water to concentrated acid. Do not mix concentrated acid directly with fertilizer concentrates or other chemicals.