Hello and welcome to the forum!

Those are some interesting circular spots. Any UFOs in the area?

Okay, let's start with the following:
1 - Update your signature with all of your pool and equipment info (see mine as an example). Appears to be plaster, but all info will help.
2 - How do you test your water?
3 - Can you post a full set of water results? (From TF-100 or Taylor K-2006)
4 - How do you chlorinate?
5 - Pool history? New, or existing home purchase? Anything else?
6 - Any autmoated cleaners used?
That should help us get started.