I recently started using Garden Lime "Dolomite" for the added Calcium and Magnesium.
I read in another post dissolve 1tsp per Quart of water to fix a calcium deficiency. Seems my plants go Ca - Mg deficient when I flower them.
The Dolomite seems to raise my PH very little.

GOOD LUCK
Dreadscale Reviewed by Dreadscale on . DOLOMITE LIME I was going to water in some lime to stabilize my medium. Anyone sone this? I really can't see why not, but thought I'd check in to make sure. Rating: 5