just transplanted my guys from keg cups to 3 gallon smart pots so they can grow out to sex. i put about an inch of super soil on the bottom so they would have something to munch on. before i transplanted them i noticed some leaf curl on pretty much every one, in fact one of them was tacoing. after the transplant i was able to get my hands on a ph meter and i just tested the runoff to be about 5.6 which from my understanding is way too low. what can i use to get my ph back up to the correct range?