Help ph problem pls help

I feed w/ph 6 water in soil and scrog runoff is 8.5 what should i do?
4 days into flower w/140w led that has 250w output and 56w cfls
using biobiz nutes
leaves some are not fully forming and seems like growth slowed by much passed wk tops are popping up all over but the lengths of the shoots of the original tops arent growing as fast at all some have bright yellow marks on the leaves other than that it looks healthy

Post a pic?

runoff pH is not very valuable information in soil. Lacking a photo, your plants sound like they are nice and healthy. The yellow marks are probably a slight case of light bleaching due to your LED being too close.