these looked worse than yours. Its a weed itll grow out of the hot soil issue- Plant/ Flower pics - #3900 by thumper all those leaves dying should be about to be defoliated anyways. and then the nodes will burst up with new vegging leaves and branches. the fans do no good. Pluck the yellow ones off. stop watering for a week unless it gets super dry and droops. itll recover fine. also only use dechlorinated water running los.