I have not tested our fill, but we have not put much fill water in the pool yet this year. I can run that just to find out though.

I have no idea what was used to chlorinate up until I took ownership in October of last year. Could that have any impact? Some sort of residual from an acidic-type chorinating left over? Seems highly unlikely, but I'm reaching.

What sort of normal drop in Ph should I expect? Let's assume there is no rain or chemicals (aside from bleach) being added? It seems like it should remain relatively constant if no acid is being added.

I'll keep you posted.

Riles