General Hydroponics pH DOWN (1 qt)
To maximize plant growth, the pH level of your nutrients should be slightly acidic. The ideal pH for most crops falls between 5.5 and 6.5. Typically, hydroponic systems will become slightly more basic over time which is the perfect time to start supplementing with an acidic solution to maintain optimal growing conditions.
General Hydroponics pH down is the premium solution for maintaining and lowering pH levels. Acid formulated using food grade Phosphoric acid. Just add a little at a time if your nutrient pH is too high in order to lower the pH to the proper level for your crops.