Introduction (Desert Rat trying to stay cool)

Greetings!

I am a father of three, in my second year of owning and maintaining (with middling results) a safe swimming environment for my kiddos in our above-ground pool.

I failed to properly close our pool last year (no cover, and never skimmed it after we took the pump off) and ended up with a soupy green mess at the bottom of the pool that I did not properly drain when I went to re-open it. I mucked out what I thought was most of the organic material and filled the thing up. (June 17th) It took me about a month of trying to level the chemicals out, and we upgraded to a much better sand filter after a few weeks of maddeningly changing the cartridges in the manufacturer-provided pump. I finally discovered the SLAM method after desperately searching Reddit, and that seems to have worked.

Now, the chemicals seem well balanced, but there is still a thin layer of what looks like sand sitting at the bottom that my vacuum just can't seem to get up in any meaningful amount. Otherwise, the water is clear and I can finally see to the bottom.

The kids have gotten in it a couple of times, and when they do, it kicks up all the debris and turns the water grey.

We've got probably another 50-60 days of swimming weather here in New Mexico, but I am wondering what, if anything, I can do to get the last of the dirt out before it's time to close things down again (with a cover this time).

Thanks, everyone, I look forward to learning from y'all - this website would have been a lifesaver before the season started.
 
Sounds like algae - dead or alive. Dirt/pollen/etc doesn't typically poof up and cloud the water.
If it's dead and there's no growth, then it's all about filtration. Or vacuum to waste.

Consider doing an Overnight Chlorine Loss Test to confirm you have no algae still growing.
The 3 exit criteria for SLAM weren't exactly met (failed crystal clear water) but that's ok for now.

OCLT will confirm if you need to SLAM a bit more - but with water already fairly clear, would be short work.

How are you chlorinating?
You need a proper test kit to perform OCLT and for continued maintenance - test strips are more accurately called "guess strips." They should not be used.
Test Kits Compared
Pool Care Basics