pH Down Solution (8 oz pH Adjuster) from Aquager Technologies safely lowers the pH of alkaline water back into the optimal 5.5-6.5 hydroponic range — essential for hard tap water and post-flowering nutrient adjustments. Concentrated formula: Just a few drops per gallon — one 8 oz bottle treats hundreds of gallons. Fast-acting correction: Quickly drops alkaline water to the optimal range for nutrient uptake. Plant-safe: Gentle formula won't harm roots or foliage when properly dosed. Essential for hard water: Most municipal tap water runs alkaline — pH Down brings it home. Long shelf life: Stable formula stays effective for years when stored properly. Pairs with pH Test Indicator: Test, then dose with precision using a dropper. Works for any water source: Hydroponic reservoirs, soil drench, foliar mixes. Alkaline water locks out iron, manganese, and other key nutrients — a common cause of yellow leaves. Order from Aquager Technologies today and dial in the optimal pH. Compatible with Aquager Hydroponic Home Farm AND any soil garden — for indoor or outdoor use! Size: 8 oz / 237 ml concentrate Use when: pH reading rises above 6.5 Optimal pH for hydroponics: 5.5 - 6.5