Quote Originally Posted by Rangeball
Ok.

I plan to add the acid and drop the PH as low as possible tomorrow morning so the pool will be ready for them swimming 10 hours later. However, they are now calling for scattered thunderstorms, but I guess I'll still be ok if it rains and we call the kids off because I've noticed rain is one heck of an aerator also
And beyond that, the pH of normal rain is something like 4.5 to 5.5 (and even lower for "acid rain").