I had to put more water in the pool today so I could backflush, so a bit more nasty stuff to clean up. I'll try sweeping it to the center as you suggest and condense the vacuum time.Maybe try to carefully but quickly vac to waste so you don’t overwhelm the filter. If at all possible you could attempt to slowly brush the sediment to one spot so you can get the bulk of it quickly with the vac without losing too much water.
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No matter the media - follow the 25% over clean pressure rule.
If I waited until my psi was 25 my filter would probably blow up & I would have zero flow.
My clean pressure is 10
I backflushed for 1 minute and the pressure dropped 5 pounds, from 20 to 15. The sight glass was completely clear so I didn't think continuing would do any good. I've no doubt I'll need to do it again right after vacuuming.
My test kit shipped yesterday so I should have it at the beginning of the week. I'll do a full test and see what needs to happen.
Do I need to continue with one bottle of bleach per day until I've gotten my first test under my belt?