Starting up and trying to avoid the pool stores

[PoolDoc]

My manual says it should have a min of 10, an ideal of 30-50 and a max of 100.

you said, they said:

I called Intex to see if we should add it and the guy said we didn't have to [add stabilizer] and that we could just wait and see if we needed it.

If that's correct, we already know, they don't know what they are talking about. The recommendations you report are simply copied from old NSPI / NSPF recommendations. You need higher levels.