Help what is wrong?!

they have been doing this slowly...

COCO A&B 2.5ml/gallon
PH:6.0
18/6 flo lites
CoCo Medium

hard to tell could be ph imbalance so check your ph... might mg deficiency try some epsom salt couldn't hurt...

You arnt using nutes yet are you? They just need nutes, start them at 15% of what the package says, then slowly work your way up to 75% of the package directions and dont go past that.

Also, stop cutting the fan leafs. That is for people who really can't water there plants enough and need to cut down on respiration. Also, some people do it for cloning. Either way, stop it.

looks like a lock out, but they could they could just be hungry. i think the recommended dose is like 2-4 ml/ L. theres 3.78 liters in a gallon so you might want to bump it up a bit. what is the pH of you runoff?

Ooooooh, you did say your using nutes. I couldnt tell what you were saying there. I thought it was your soil. It still looks like nute deficiency.