White Widow. 1 plant doing fine, other 2 have this on the leaves. I’ve tried ph adjustment, soil ph showed between 6.1 and 6.5 all around the pot. Runoff PH was a little more eye opening and showed as 5.9, but I figured the Limestone on the bottom might have added to that low reading.
At first I blamed temperature issues because both plants were near an air source. One right next to the air intake the other right in front of the little fan that circulates above the plants. I moved the air intake hose up above the plants, closer to the lights. It made it easier to keep the temperature around the plants themselves steady, but these two still kept browning. I wouldn’t have been so concerned except I started to notice new growth with the same browning. The brown seems to run along the veins and then blobs outward.
Today we flushed the one plant. The other has become a sacrifice to the drying room test. (not bad bud for an immature and sick plant.)
Today I flushed with sledgehammer.
Anything else come to mind guys?