GrowFAQ:

How do I adjust the pH in chemical solutions?

  Added by: MisterIto  Last edited by: MisterIto  Viewed: 381 times  Rated by 2 users: 5.00/10
To lower ph: use nitric acid during vegetative; phosphoric acid during flowering.

To raise ph: use potassium hydroxide or potassium silicate, which also provides silicon.

  Last modified: 00:30 - Nov 28, 2000 

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