Currently have 2 fast buds west coast og kush 31 days and 21 days old, 1 muchacha auto , and 1 tastebudz peanut butter cookies growing in 5 gal promix hp under a tsw 2000. I feed with remos nutrients until runoff. I have been aiming for 6 ph but I think it was on the low end because last feed I fed at 6.5 and the runoff was 6-6.1. I believe that was a problem for my plants, anything else you guys can recommend? I use well water, do the plants look like they need some extra calmag?