heat is a deceptive bitch. I just had to replace a 6000btu w/a 15000btu and it's fall. i added 1k to the room and the temp went up 8-10 degrees. i thought the 6k could do it, but i was wrong. my 4way hybreds are picky, picky, and started yellowing in 2 cycles of light. yep that fast. no central ac is making this fun and challenging, but hey, what else would i be doing? 9to5...lol

gl hn and heat will cause those spots too. heat + not much air movment?
420freedme Reviewed by 420freedme on . Discolored and twisted leaves The small leaves around the bud sites on all of my plants have started to turn dark and become twisted. The large leaves are not at all affected. I'm using the Lucas Formula, so this *shouldn't* be a nute use (but I'm not rulling that out). I just discovered this morning that the res temps are too high, so maybe that's the issue. Grow Details - DWC Drip Feed Hydro system Lucas Formula - GH based nutes - flowering profile - 920ppm pH - 5.6 and stable 6 - 42w "soft-white" CFL's over Rating: 5