In the past seems like holding my ph closer to 7.2-7.5 the chlorine holds better. In the past at 8+ a gal brings it down to about 7-7.5. We are expecting thunderstorms this afternoon. Rain always seems to raise ph. Thanks any other thoughts?
I was just curious cause when I add less than a quarter gallon is affects my PH pretty significantly... like from 8+ to 7.4 - 7.6. My pool is not too much bigger than your pool. But my TA is really low so maybe that has something to do with it. You might want to try the Pool Math app. It's free and should provide some good guidance on the amounts of chems to add to get to desired levels.
Anyways, I'm curious what your PH is now with that much acid added.
@Scarecrow you should use the PoolMath app to calculate your additions instead of winging it. A gallon seems like a lot to me. By using the old pool math app for a 23K pool only 40 oz is needed to drop the pH from 8.2 to 7.5 (using 20 baum). I would check and see what your alkalinity is now after a massive acid addition like that.