bottom yellowing caused by weak light in there but top part signs are looking like ph problem to me.You definitely have nutrient excess in your soil by looking at the leaves,they are clawing and edges are yellowing.excess nutes causing lockout,dropping the soil ph.I would check runoff water EC first,I bet it is over 2,if so this means you need to flush.drop it to 1.0 - 1.5 by flushing.by doing this,soil ph will go up again.I wouldn't adjust the ph of the water for flush,no need to drop soil ph any more.let the pot dry out for a few days.Leaves wont turn back to normal but you can reduce the stress it is having by flushing.let it use what's left in the soil and get rid of the excess with pure watering.you can extend the pure watering session to a week or so.you won't need bio grow from this point as it definitely annoying your plant(clawing tips).just cut it off and continue with bloom,it has some N in it too.Unless you've been spraying nutes,this is definitely looking like ph problem.my opinion. and when you start feeding again,stick with 1ml/lt and you'll be safe.generally speaking from my experience