Yellowing of leaf tissue w/ the leaf vein remaining green- Fe chlorosis.

You may be using a nute w/ insufficient Fe, but I think it's more likely the lower availability of Fe @ higher pH. Try dropping it down to 6.0- 5.8.

Foliar feed w/ a good micronute @ about pH 5.5 should clear it up quickly.

Best I can do- can you get a pic in focus?

Brown/yellow spotting likely a Ca issue- again, try dropping yer pH.
rhizome Reviewed by rhizome on . What Wrong with my leaves???? whats up, I am have a huge problem with my plants and its getting worse. If somone could please help me with this one, iwould really appreciate it. Heres the problem, as you can see. The fan leaves on the plants are getting yellow and have these brown spots with curling at the tips..whats wrong and how do I fix it?? AGE:3.5 weeks 400w MH Temp 78 degrees Growing medium- rockwool in claypebbles (in hydro) humitdy 38% Rating: 5