General Hydroponics - pH Down

Brand: General Hydroponics

General Hydroponics pH Down

pH Down is a liquid pH-adjusting solution formulated with food-grade phosphoric acid to lower the pH of a nutrient solution. It brings solutions into the proper range, typically pH 5.5 to 6.5, where nutrients remain most available for plant uptake. It is built for hydroponic systems and liquid-feed programs and works alongside General Hydroponics nutrient programs. Performance is consistent and repeatable, which matters for operators managing pH on a schedule.

Mix nutrients into fresh water first, then dose pH Down sparingly into the fully mixed solution, stir and re-test, repeating until the target pH is reached. Never adjust undiluted concentrates. Verify results with a calibrated pH meter or a liquid test indicator. The solution is corrosive, so wear appropriate eye and skin protection; store tightly sealed in a cool, dry place away from direct sunlight, where unopened product holds potency for roughly two years and opened product is best used within one growing season.

Available Options

• 8 oz (SKU GPD8)
• Quart (SKU GPDQ)
• Gallon (SKU GPDG)

Key Features

• Formulated with food-grade phosphoric acid
• Lowers nutrient solution pH into the 5.5 to 6.5 target window
• Liquid formulation for hydroponic and liquid-feed programs
• Compatible with General Hydroponics nutrient programs
• Added after nutrients are fully mixed, never to concentrates
• Dosed a little at a time with re-testing between additions
• Approximately two year potency unopened when stored cool and dry
• Corrosive solution requiring eye and skin protection

Ideal Applications

• Correcting high pH in recirculating hydroponic reservoirs
• Batch tank preparation for liquid-feed programs
• Coco and soilless fertigation pH management
• Indoor cultivation and controlled-environment agriculture facilities