DIY PH Up (K2CO3 aka Potassium Carbonate or Potash)

A very good (and inexpensive) PH up is food grade K2CO3 aka Potassium Carbonate or commonly known as potash or pearl ash. You can get a pound of it for around $10, and due to it’s high concentration will be enough to last you a very long time.

Potassium carbonate, K2CO3, is a standard ingredient in the wine industry. It may be also be used in pharmaceutical labs as a drying agent or to make soap, to make glass, and to soften water. Many growers also amend their soil with potash to help stabilize the ph.

Potassium carbonate is a very fine powder that instantly dissolves in water. You just need a few grains, literally a pinch of it, to significantly raise the ph.


I always love it when they come dropping that science! :nerd_face::lab_coat::sunglasses:


I used it to ph up for a while until I ran out, now I use potassium silica to PH up if I go to far ph ing down.


That is a good alternative also, and your plants benefit from the added silica in potassium silicate.


Also U can just dump some calcium carbonate into the res it will desolve until pH is around 6
And start desolving again once it goes below

Not perfect but it auto pH for ya