I mixed organic choice with hyponex sterile soil bag to bag, and added extra perlite. Using pure blend pro. And had Absolutely no problem! I grew a NYCD, a Cali Orange skunk, and an Afgani. All 3 grew beautifully. I added just water for 2 weeks then alternate water, and PBP. With my well water. I add PBP, and get 5.9 ph.

I totally do recommend Miracle gro organic choice. I think you have other issues that won't be resolved by buying overpriced foxfarm soil.

1. Are you adjusting ph of water/solution before adding to pot?

2 Why did you post a query titled ph problems?; Yet never once mention the ph value of your overflow???

3 What is your ph?