Use Bluelab pH Up and Down to adjust nutrient solutions to the optimum range of pH and improve nutrient availability to plants. Bluelab's pH Down is made of 35 percent w/w (certified) phosphoric acid, and pH Up is made of 35 percent w/w (certified) potassium hydroxide. The premium-quality acid concentrations are easy to use in any growing system. Use undiluted with Bluelab pH Controllers and Bluelab pH Controller Connect.
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