Theory

[gcarter]

A new theory.....

http://www.donzi.net/forums/attachment.php?attachmentid=29706&d=1182531319

[justleft]

Yep I would agree.

We operate over 70 condo/noighborhood pools and when there is not enough
folks pissing in them we have to add acid to keep the pH down.

This time of year we have to add Soda Ash to keep the pH up.