New CH "ideal" Levels


Bronze Supporter
Nov 30, 2019
Pawleys Island, SC
So the CH levels in the updated Pool Math app are significantly higher than before. I've been holding CH at 280 in my 8500 gal FG salt pool which was about ideal before. Now the ideal is 350-550. Entering the new nominal ideal, 450, into Pool Math as my new target (it doesn't retain that new target by the way, reverts back to my previous non-updated app target) Pool Math says to add 13lbs of calcium chloride to my 8500 gal pool to get to 450. I'm about to do that unless I'm interpreting something incorrectly. Am I?


Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
Laughlin, NV
You are in the recommended range. And to be honest, with a fiberglass pool, there is no need for that high of CH. But, we erred on the side of caution because FG pool manufacturers are still showing that.