Early Flower ....need Advice

[RoyceR72]

I have 6 critical mass, all 4 feet tall and bushy..I'm following General Hydroponics Flora series for drain to waste..
1 plant is showing 30% yellow leaves, ...all others are healthy..advice please, thank you

 

[lazyfarma420]

Show sum pics

 

[mulehunter]

I have 6 critical mass, all 4 feet tall and bushy..I'm following General Hydroponics Flora series for drain to waste..
1 plant is showing 30% yellow leaves, ...all others are healthy..advice please, thank you

How did you make out on that critical

 

[Dabominable]

Need some pics Boss. Yellowing leaves my immediate 'think-reaction' would be calcium or nitrogen def. Could hit em with a foliar. Could be something in the soil. (If from 6 different seeds and not the same donor plant for clones) It could have other needs,being a different pheo (possibly), weird, but it does happen sometimes. My 2 cents, get some pics up.