Your ph fluctuation is causing stress. Keep the ph steady at all costs, or the ladies will continue to suffer. (papery-thin leaves with a washed-out color, sagging leaves that narrow at their crotch and look like an upside-down canoe) Yellowing will deepen and nanners might start appearing if you are not diligent.

Beyond that, a hydro gardener will have to check your schedule and such. (I only do soil)