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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 5.3 and 6.8. Depending on the stages of the growth cycle.

Users of Standard Hydroponics nutrient products generally do not experience problems maintaining the proper pH range because our formulas are Not pH buffered chemicals like some brands that regularly leads to inhibited nutrients.

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, So for the best results is to dilute pH Down in some water then add to the nutrients as directs by our Ph.D. Lab Team From over 30 yrs in growing.

High growth rates can also destabilize pH., meaning high intake of nutrients will raise pH Up A Bit, Don't panic this is normal add more pH Down Drop, By Drop.

pH Up

The premium solution maintaining and raise a nutrient's pH level. Base formulated using Potassium Hydroxide and Potassium Carbonate. Add a little at a time if your nutrient pH is too low in order to raise the pH to the proper level.

pH Down

The premium solution maintaining and lower a nutrient's pH level. Acid formulated using food grade Natural Additives As Well As Phosphoric acid, Citric Acid, And Pot Ash.

Just add a little at a time till you get a feel of what works best for you if your nutrient pH is too high in order to lower the pH to the proper level.


  • pH Down 300ML
  • pH Up 300ML
  • Measuring Pippettes 
SKU: 210000006019