General Hydroponics pH Down Liquid - Phosphoric Acid pH Adjuster for Hydroponic Nutrient Solutions - 1 Quart and 1 Gallon - Pickup in Store Only
General Hydroponics pH Down is a liquid acid pH adjuster formulated with food-grade phosphoric acid to lower the pH of hydroponic nutrient solutions and irrigation water. The premium-buffered formula gives stable, predictable pH control; add a little at a time until you reach your target. Ideal for any GH nutrient program that targets pH 5.5-6.5.
Key Features
- Food-grade phosphoric acid formulation lowers nutrient solution pH
- Premium buffering for pH stability
- Reliable pH control for hydroponic and liquid-feed systems
- Works alongside GH nutrient programs targeting pH 5.5-6.5
- Useful with high-alkalinity water or pH-unstable media such as rockwool and gravel
- Corrosive acid: wear eye and skin protection; keep out of reach of children
How to Use
Mix nutrients into fresh water first, then add pH Down a little at a time. Stir, re-test, and repeat until the target pH is reached (recommended pH for most crops is 5.5-6.5). Do not pH-adjust concentrates. Use a pH test indicator or a calibrated meter to verify. The amount needed varies with water quality, reservoir volume and nutrient recipe. Store upright, tightly sealed, in a cool dry place.
Product Details
- Composition: phosphoric acid, about 15% by weight (per the manufacturer's safety data sheet)
- Size: 1 quart (946 mL)
- Made by: General Hydroponics
- Safety: corrosive acid; wear eye and skin protection and keep out of reach of children
Model # / SKU: HGC722120
- In stock (16 available)
- Backordered, shipping soon
Shipping:
We ship via UPS and USPS. Most orders ship within 1–2 business days from our Bay Area warehouse.
Returns are accepted within 30 days of delivery for unopened, unused items in original packaging. To initiate a return, email us at dsgardensupplies@gmail.com.