Since I'm no chemist I am trying to understand why my pH is always rising to unacceptable levels. When I opened my pool this spring my TA was 290 and CH was 530. My fill water is from a well and has about the same numbers. Over the past 4 weeks I have added 3 gallons of acid (not all at once) and pointed all 5 of my returns to the surface. My TA has lowered to 180 in this time but my pH can rise to "off the scale" red in as little as three days without adding water by well or rain. I don't have a SWG and have been using 6% bleach for sanitation.
So my questions are this:
Could my return jets be causing enough aeration to have this effect on pH or could there be some other factor at work here?
Would adding Borax help keep the pH more stable?
Should I budget more money for Muriatic Acid every year?
If my pool is out gassing CO2 will it finally reach some type of equilibrium about the time I close the pool in the fall?
Does the high CH from my fill water cause higher CO2 concentrations which lead to out gassing and high pH?