Hi all - I moved into a house with a pool a couple years ago (last year was the first season with it). Only a couple months ago, I discovered TFP and started educating myself on how everything works. Up until then, I've been relying on pool stores/services for everything. My pool has a SWG. I know for sure that there was at least one time (maybe a couple) when a pool store recommended I add "pH down" to my pool and sold it to me. Now that I have discovered TFP, it appears that this is NOT good to add to a SWG pool, as the sulfates can damage the salt cell. Going forward I will only use muriatic acid, but how worried should I be that there may be sulfates in my pool from adding dry acid in the past? I honestly don't know how much I've added - I think it was only one time, but can't be sure - I was just blindly following instructions. I believe the only way to get rid of sulfates is to drain the pool. The pool has not been totally drained/filled since last year, but I have drained several feet a few times and refilled (vacuuming to waste, also evaporation, etc.). Should I test for sulfates? Could it still be causing damage? I may be replacing my salt cell soon, and I especially want to make sure I'm not damaging the new one.
SWG and dry acid/sulfates - should I be worried?
- Thread starter Jahlon
- Start date
You're fine. It's the repeated use that causes problems over time. And Lord knows they'll find a reason to sell it to you everytime you waltz in the store. 
You're fine. It's the repeated use that causes problems over time. And Lord knows they'll find a reason to sell it to you everytime you waltz in the store.
Haha ok, thanks. I've realized that pool stores either have no idea what they're talking about, just want to sell stuff, or (most likely) both.
