Low ALK.

[conductor500]

Ok, I added the borax when I should have added baking soda. My ph is off the chart this morning. My ph was fine at about 7.8 yesterday and I grabbed the wrong boxes and put 8#'s of borax in my pool. How much muratic acid do I need to put in to bring this down to where it needs to be? And what effects will this have on my pool. I am leaving out of town today for a week and I guess I better get this taken care of before I go?
Hope someone sees this quick, I need help.
Thanks
Also when will it be ok to add the baking soda to raise my alk?

[waterbear]

Somewhere in the neighborhood of 1/2 gallon of muriatic acid should neutralize the pH increase of 8 lbs of borax. I would start with a pint and keep adding a pint at a time and restesting until the pH is in range....then add your baking soda to rasie the TA and then retest the pH and adjust. You need to do this over a few days time. Don't try and do it all at once!

And yes, rain can lower the TA!