Well thank you it worked brilliantly. The outgassing theory worked very well despite high winds blowing over the pool from the remains of a tropical depression.

At a pH of 7.5 and an adjusted Alk of 80 I have not used any acid or baking soda in a week.

So from now on, if you do not mind, I will address you as St. Outgasser, and your theory as the Gospel of Outgassing according to Chem Geek.

Aloha and thank you once again for all your kind help.