I am a new pool owner with a pebble sheen surface. I have been using the Muriatic acid recommended by the pool calculator, however, it does not seem to have any affect to the pH 4 or 24 hours after the fact.
It is 30,000 gallons salt water pool with the following values from the pool store today:
.5 Free Chlorine
.5 Total Chlorine -- these values have gone down even though I have raised the percentage on my SWG up since my last visit
Ca Hardness: 191
Cyanuric Acid: 40
Any tips on how to get my pH down? Is Muratic acid not as effective as the pH down the pool store wants to sell me?
Thanks for any help you can give me!