i am doing coco soil also, the coco synthetic is done and dusted , i am left with all coco soil , its like promix but peat and coco percents swapped , i ph as teas go too acidic and burn roots , they came in at 4.3 at times , might as well feed vinegar, if you can get close to the zone a five quid ph tester isnt breaking the bank ,NP is growing in Coco I think? If he is that's why PH is so important. In Soil, PH isn't supposed to make a difference. The soil will buffer it.
but i see where you are coming from , 100 percent