High pH run-off?

Yeah she'll do that from time to time especially if she I flower. When extra substrate is added and has any type of nutrients it'll mess with your runoff ph. Just try to water her 6.0 5.8 just until your runoff is proper ph. Best of luck 👍

So I know nothing about growing organically - so definitely take what I say with that in mind! But I've had the same issue several times - ALWAYS balance my ph when watering or feeding and yet the runoff goes off the charts... If you're not watering with runoff every time, nutes can get trapped inside your soil or grow medium and alter what is actually going on not caring one whit what ph you're feeding/watering with... So, for me, when that happens, it's absolutely a time to flush and take things back to "neutral" (i.e., a ph runoff between 6.0 and 6.5)... then when i add nutes again, I always cut them in half and go slowly. Now, this may not be what is called for here but your runoff seems to be saying something is amiss... I'd give it a flush and continue on.... My two cents ... 😊