General Hydroponics pH Control Kit, General Hydrophonics, Mfr#: HGC722080

To maximize plant growth the pH level of your nutrients should be slightly acidic. Experienced growers consider the ideal pH for most crops to fall between 5.5 and 6.5. Users of General Hydroponics nutrient products generally do not experience problems maintaining the proper pH range because our formulas are pH buffered. However some important exceptions do exist. pH can acidify to an unacceptable level when nutrient solutions are used with poor quality water or pH unstable media such as rockwool. High growth rates can also destabilize pH.