As a commercial hydroponic grower, you need a reliable and pure pH down solution to keep your plants thriving. That's where Custom Hydro comes in – offering very pure concentrated acids including sulfuric, phosphoric, and citric acid. And with automatic scheduled shipments, you'll never run out of this essential nutrient.

• Never run out of pH Down again
• Very pure formula for commercial hydroponics
• Concentrated solutions of sulfuric acid, phosphoric acid, and citric acid