Just finish the grows and get the next one going. Sounds like just plain stressed plants. It could be lack of light or water also.
WashougalWonder Reviewed by WashougalWonder on . thrips, bug bombed, thrips gone, still new growth leaves on bottom yellowing/browning Your Equipment: .1) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's) 1000W HPS .2) Distance from tops? 16" .3) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...) Enclosed reflector .4) Is there a consistent fresh air supply? Yes, to lights and exhaust/intake for room with carbon filter .5) Do you have an exhaust fan and a circulation fan? yes and yes, stand up 14" circ fans .6) What are the bulb wattages, kelvin ratings, and Rating: 5