Problems during flush or normal?

So I have started to flush my plant. She got her second watering with just ph'd water yesterday so she's 4 days in as I'm now having to water every two days. I know it's normal for your leaves to yellow but my leaves are turning yellow and black. The black is what worries me. Buds themselves look good and seem to be packing on just a tad more weight to them but not much. Here's some pics . If it's normal during flush then awesome if not please let me know. I've tried to hit Google but came up empty handed. Thanks again everyone!

curious why the flush? What soil is that?

SPLFreak808 said:

curious why the flush? What soil is that?

Click to expand...

Atami B'Cuzz Hydromix HP. Starting my two week flushing as I'm harvesting at the end of next week.

It was in Bush Doctor CoCo Loco but I didn't like how "muddy" it got after watering.

With a week to go I think your fine....no worries