I don’t grow auto’s , I grow photos in coco perlite. I raise the ph during flower gradually from 5.9 in veg up to 6.5 at the end of flowering.
5.9 is too low for flower
Concrete mixing tubs with a metal shelf sitting on top - i just use a shop vac to suck up the waste every couple of days- dump it in a 5 gallon bucket and toss
This happens to me every so often- I know what it is so remaining calm and letting it pass helps-
If you are like me- you are probably not eating enough throughout the day. I feel better if I eat something a little while before consuming.