Fruity Pebbles 2.0 - QCS

I started the foliar feed and I'll give one once maybe twice a week when the light turns off. Buds are stacking up nicely. The leaves are lightly yellow and the soil is still super hard to keep in the right pH but she's stable. I hope all the problems won't affect quality. The water goes in at 6.5pH - 985ppm and comes out at 6.0pH - 890ppm, so I know nutrients are staying but the soil's a bit acidic so next watering should be at higher pHand I should be sure there's runoff. Everything is really flat and the PPFD ranges from 1100 to 1450. We did 1/3 of the flowering.