You are correct, it's sodium hypo, that was a typo on my part and I couldn't edit the post yet.

That CYA reading is from the pool store test, I am waiting for my taylor complete test kit to get here.

I'll grab a gallon of distilled water and re-test the PH. While I am at it, since this basic test kit does not 'read' CL levels over 10 do you do the same when trying to get your CL level to 15 (if a half distilled sample read 6 then it's 12 kind of thing) ?

Thanks again, Rob