Curling tips

Do some of your leaves look like this? Yellowing from outside and curling?

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Wait one. I just noticed something. Rocky, in the pics I seem to see the buckets filled entirely with rocks or Hydroton. Is this actually the case? If so, then it works in favor of my hypothesis ... poor air exchange. cn

well ok i played with phs and pf stabillities of the feed. different kinds had slight reactions. but im using distilled water. ballanced and neutralized ph of 7 started at 7. added general ogranics vegetation feeds, bio weed, bio roots, camg+, and bio thrive grow. all four of these in the water lowered the ph to about a 5.5. so my feeds ph is 5.5. mean while my ph in my soil is 6.5 i feed and after words check the ph of soil and come out with a level 7!!!!! which makes no sense to me but it all leveled it self out. water with a heavy feed of ca mag + in case of calcium magnesium defficiency. lower the distilled ph fgrom 7 to 6.5.
natural organics ferts are basically downers in themselves for ph for anyone who cares.