aylad,

Thanks for sharing your experience. If I do put up a shade, I'll report on the effectiveness here.
I'm considering solar pool heating as well, so it might make sense to do that project first and see if it can provide some cooling during July/August in Phoenix.

To all... is there any software available to model pool temperature? I know it's a long shot, and if it exists it probably costs a lot anyway??

hikernut