Were growing in soil under 250 HPS 12 and 12 of course and the plants are about 11 weeks. Are problem is that in the process of depleating the N for bloom the PH has gone up to Neutral and P & K are low. How do i bring down the ph. Should we bring the N back up a little? N is Nill P and K are low to medium low. The picture is a bit deceiving..the yellowing leaves are from letting the plant get to dry about a week ago!