waterhashgrow

starting to have some issues with the single trop, i could use some advise with actually, very bad yellowing, and almost stop of growth. I tested ph of runoff again and its actually a bit high at 6.5. watered til 20% runoff with 5.5 ph water, hopefully things get better. began to feed cal mag as well. Other plants look very hot and foxtailed but they are on track otherwise.