Dial in perfect plant nutrition with a General Hydroponics pH Control Kit. Maintaining the right pH (5.5–6.5) is one of the most important steps for any grower. Outside this range, key nutrients get locked out, causing hard-to-diagnose deficiencies. By testing and adjusting pH from the start, you prevent problems and help your plants reach their full potential in growth, yield, and potency. Balanced pH allows your plants to efficiently uptake all the nutrients you provide. General Hydroponics pH Control Kits make testing and adjustment fast and simple. In just a few moments, measure pH, correct with pH Up or pH Down if needed, and re-test to confirm your solution is in the ideal 5.5–6.5 range. Essential for beginners and seasoned growers alike.