also some extra info...my tap water has a ph of 7...my nute mix is about 5.8 which i use rarely (once every 2 weeks)...i've added bushmaster to the three that are now yellow when i come to think bout it...used it 2x a week for first two weeks of flowering to stunt stretching...prob. a ph problem although bushmaster also reads at about 5.9...plants were watered yesterday so i can't overwater to check the ph...any ideas?