Rising pH is also an effect of the operation of the SWCG, and is something that you'll always see as long as you use it. If you'll drop your TA to the 70-80 ppm range, and drop your pH to 7.6, it should help it stay more stable, although it won't stop the rise altogether. Adding acid on a routine basis to combat the pH rise is one of the only water maintenance issues with a SWCG.

Janet