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HELP - Yellow lower leaves/spots

gtg341w

Member
I posted a few days ago HERE and was having problems with high res temps and early signs on root rot. I emptied the res, and cleaned everything with H2O2 and refilled and treated with Hydroguard (after the H2O2 had time to dissipate)

System: 15 gal in 27 gal container, plants in hydroton, top fed rDWC, grow tent, 600W MH

Since then I have gotten res temps under control but have been having more problems with wilting and the lower leaves turning yellow with a few spots on the leaves and stems. My PPMs were around 350, but have raised them to around 600 (which is 50% of the suggested GH amount of Flora Trio) My PH is holding right around 5.7~5.8, ambient temps around 77~80 during the day 68~72 at night.

I can go into more detail, but would rather hear from you guys based on the pictures. The larger more wilted plant is AK-47 and the other is a high CBD indica strain.

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gtg341w

Member
Update: from the Hydroguard the res is smelling cleaner/fresher, but the yellow lower leaves are still bad. Some of the upper leaves are darkening slightly.
 

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