Hi Liquid,Have you been misting them when the lights are on i had similar spots on some of my leaves.Am not sure but i think the light was being magnified through the drops of water and burning the leaves so i just started to mist the plants 5 minutes before lights out and they have recovered all new growth is now a lush green.Hope this is of some help.

Take it easy
floyd2zapper Reviewed by floyd2zapper on . Yellow brown spots on leaves... This is a shot I took two days ago of a plant. Upon a friend's recommendation, I ceased using my nute program and dumped my solution entirely, using only water and hygrozyme, ph'ed to 5.7. Now, some more spots started appearing on one of the newer leaves yesterday, just isn't as full-spread as this one was (this is on the first true set of leaves). I'll try and give as much info as possible. Room is kept 74-77 degrees at all times, plenty of air circulation, humidity is 55-59%. Light is Rating: 5