Keep your pH levels stable and supplement your plants in grow at the same time with this fantastic pH Down product from Dutch Pro. Keeping your pH levels correct and stable is very important when growing using hydroponics, Dutch Pro pH Down Grow is an easy and effective way to keep your pH values within normal limits. Very easy to apply and cost effective there's no better way to manage your pH. Dutch Pro pH Down Grow is a nitric acid solution designed to lower the pH of your nutrient feed. Apply Dutch Pro pH Down Grow in small amounts until you reach the desired pH level (usually around 5.8 – 6.5 pH). Dutch Pro pH Down Grow is intended for use in overly alkalic nutrient solutions (pH 7 – 14) if the pH of your solution is pH 0 – 7 then you need to use Dutch Pro pH Up. Please note: Dutch Pro develop two different pH down solutions, one for bloom and one for grow. The Bloom variation contains 30% phosphorous acid and the Grow variation contains 38% nitric acid, the variation in acid is to accommodate for your plants' varying nutrient needs in grow and flower.