I am trying to get my PH down before I shock and I can't seem to do it. Does MA get stale after some time? I am using some leftover from the previous owner. There is still fumes coming out of the bottle and it still stings when some of them gets in my eyes
Here are my numbers.
I added 16oz(Pool Calculator) of MA 2 nights in a row and the PH has not dropped at all.