My original mix is basically a coots mix.
The base soil mix is compose of:
1/3 Sphagnum Peat Moss
1/3 Compost or Vermicompost
1/3 Aeration
For each cubic foot (7.5 US gallons) of soil add:
1/2 Cup Kelp Meal
1/2 Cup Neem Meal
1/2 Cup Crustacean Meal
1 Cup Malted Barley Powder
6 Cups Charged Biochar
1 Cup Oyster Shell Flour
1 Cup Gypsum
1 Cup Glacial Rock Dust
1 Cup Basalt Rock Dust
The test that I showed isn’t the saturated paste test, it is a Mehlich 3 soil test. But that doesn’t change the pH value. Because of all the rock dusts, it’s no surprise the pH is slightly above 7.0. It’s a heavy calcium mix, I’m targeting 85% TCEC calcium saturation.
I’m not a fan of dolomite personally, it has too much magnesium for my liking. I would just use the oyster shell flour at a tablespoon per gallon works out to about how much I used in my mix. That should be plenty. The ProMix already has lime and you are only using 10% compost.