Header image  
The #1 Cannabis Website in the WORLD.  
line decor
  HOME  ::   Message Boards  :: Photo Image Gallery   ::  Medical Marijuana   ::  
line decor
   Main Menu

Advanced - Nutrient Formulations

How do I adjust the pH in chemical solutions?

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.