Thanks yes I was following your old M/C thread before it was closed it was very informative.You're more than welcome to link away. I've been growing in Pro-Mix or my Faux-Mix® copy of HP for the last year and a half without adjusting pH. I use Mega Crop and supplement with Silica and Cal-Mag. That allows me to tweak the N-P-K numbers a hair to get to the 2-1-3 ratio I prefer, and gives the plant more Silica than just plain Mega Crop (where I think Mega Crop is lacking).