Product: General Hydroponics PH Down Qt. - ACID
Brand: General Hydroponics
pH Down - Acid is formulated using food grade Phosphoric acid - pure plant nutrient. Just add a little at a time if your nutrient pH is too high and this will lower the pH to within range. Simple, reliable and effective.
Sold on Amazon

Search query: general hydro ph up and down
Relevance: Exact