Looks N deficient, What's you lighting schedule? I guess by the pics your still trying to vege them?

CoCo doesn't have any nutes,... so YOU have to feed the plants,... Looking at your feeding schedule (or lack there of), I'd wager that this is the source of the problems.

I've got no experience with CoCo,.. so that's just my "Gut" feeling,... hopefully one of the many experts will chime in soon!
canniwhatsis Reviewed by canniwhatsis on . leaves turning yellow trouble shooting forum + pics What is your experience level? (first timer, novice, experienced...) first time Your Equipment: .1) Type and wattage of lights. CFL's 23 or 26 watt 8 of them .2) Distance from tops? about a inch and a half .3) Reflector type? bare bulb .4) Is there a consistent fresh air supply? yes .5) Do you have an exhaust fan and a circulation fan? yes .6) What are the bulb wattages, kelvin ratings, and schedule? watt 23 or 26, higher spectrum i think 5000k (can't remember and they're off atm), 16 Rating: 5