As one of the "iner" experts () - I completely agree with Jan!

Like when you take your water down to the pool store for testing, they are trying to tell you that you need an expensive repair for a ~ non-issue

I believe that you have a 'surface water' issue and the solution is to provide heavy rains a trench to bypass the pool (I'll gladly consult with you on this if you'll tell me the topography of your yard )