Intex type pool?

[grammy57]

I filled out the chart, as requested.

We filled it about June of this year. I use chlorine tabs, algae fighting stuff, shock once or twice weekly and LOTS of Ph reducer. I was going to try your suggestions for not worrying about Ph and then it said it wouldn't work for an Intex. I'm not sure if you'd call this an Intex or not. It is vinyl on poles, but it is thicker vinyl and can be left up all year, even in Michigan. We run a sand filter and pump, not the small Intex type.