cool, and thanks for your quick reply! i just checked under the leaves and all looks mite-free. i've raised the EC from 1.3 to 1.6, so hopefully i'll wake up tomorrow not to find the girl burned! interesting point about the water...perhaps it's not a coincidence then that the spots showed less than 24 hours after the last change?

finally, and this may be a weird one, but the leaves with yellow spots are the ones facing the full brunt of a desk fan...the leaves on the other side of the plant are simply gorgeous! the tent i'm using has, besides the desk fan at the bottom of the unit, a basic intake-outtake fan setup...

do you think I should prune the spotted leaves, or just leave well alone?

all best and thanks for your advice and experience!
jash
jashbery Reviewed by jashbery on . bright yellow spots OK - first off, apologies, as my digital cam isn't working...but I can describe the problem pretty well. Set up - one female flowering for about ten days in an NFT system under 250 HPS, with an EC Meter reading of 1.4 consistently in both veg and flower. Water and grow-tent temps exactly where I want them. I change the water every 3-4 days. Plant generally looking in excellent health until about three days ago, when I noted bright yellow spots in the middle of just some of the leaves...not Rating: 5