Sub-substrate for ABOVEGROUND POOL -- what to put under pool sand?

[clayhillpool]

I'm installing an aboveground pool on top of CLAY SOIL. I literally live on "Clay Hill Road" so this is almost 100% clay soil. I dug down to a level place, but need to put something under the pool sand so that I can level the ground (leveling clay isn't really possible).
Do I use stone dust? Or should I use something like Item #4?
As I see it, stone dust pros: will have a similar (non)draining quality to the clay around it. Won't let the pool sand seep through. Cons: won't drain.
Pros of Item #4: will drain water. Cons: some pool sand might slip through, messing with the level...
Thoughts anyone?

 

[duraleigh]

I don't see item #4

I would suggest a product called "fines" in the quarries in NC. I think it is called several different things around the country

It is limestone from 1/4 inch diameter down to dust. I compacts nicely, drains well and resists washout. I would consider it as fill and the final grade on an ABG installation.

 

[phonedave]

I don't see item #4

I would suggest a product called "fines" in the quarries in NC. I think it is called several different things around the country

It is limestone from 1/4 inch diameter down to dust. I compacts nicely, drains well and resists washout. I would consider it as fill and the final grade on an ABG installation.

Item #4 is yet an other name for Quarry Process, QP, Crusher Run, DGA, Dense Graded Aggregate etc etc etc etc

I actually believe it may be slightly smaller (1/2" down, as opposed to 3/4" down) but still pretty much the same thing.

 

[duraleigh]

Washed pea gravel would also work. Hardly any need for compaction but it may wash out some in a really heavy rain.