Found this on another site:
PH for the nutrient mix for soil is 6.4 - 6.7
PH for the nutrient mix for Peat is 6.3 -6.4
PH for the nutrient mix for Coco is 5.8 to 6.2
PH for the nutrient mix for hydro is 5.8 to 6.2
Would Promix HP fall into the peat category? Or maybe between peat and hydro?