what makes the ph go up?

[aylad]

pH rise can be caused by many things, among them use of bleach or cal-hypo, aeration of your water, curing plaster, or sometimes your pool will just find its "normal" level and want to stay there.

Janet

[Bergerman]

Thanks for all the help. My Ph is down to 7.3-7.4 and holding steady . My alk is at 80-90 or so after a ton of rain.

Cheers,
Ed