I've had this problem before on plants but not this early and I can never get to the bottom of it can't be nute burn so I'm baffled unless it's pH or something
What are the temp and humidity?(you just put up)
How many cfl bulbs you using, how many watts?
What did you water with tap water or R/O?
Do you adjust your ph?
Thanks I'll give them a good soaking and move light a bit further away see if it helps I PhD the tap water it's 7.4 is that high enough that it needs to be altered or should it be OK for now have no pH down at minute ill get some asap