Hi all. I'm a new (one season) owner of a 20k pool with a SWG. I just replaced the cell with a 40k capacity one. Until recently I couldn't get a free chlorine reading to save my life. I finally realized it had to be CYA so I got a test strip and it showed I had virtually none. I added four pounds of CYA over the course of a couple of days, and ever since I've been getting free chlorine readings well within the normal range (around 2). All of my other readings are within the good range as well -- except, that is, CYA, which still reads low even after the 4 pounds.
I've been experimenting running the SWG at 50 percent for 10-12 hours a day and now consistently getting free chlorine readings around 2. For what it's worth, the pool gets pretty light use and always looks perfectly clear and clean.
Here's my question: if I'm now getting consistently acceptable free chlorine readings, do I really need to keep adding CYA? I've read that too much can eventually be a problem and require draining your pool, which I don't want to do.
Thoughts? Thanks.
I've been experimenting running the SWG at 50 percent for 10-12 hours a day and now consistently getting free chlorine readings around 2. For what it's worth, the pool gets pretty light use and always looks perfectly clear and clean.
Here's my question: if I'm now getting consistently acceptable free chlorine readings, do I really need to keep adding CYA? I've read that too much can eventually be a problem and require draining your pool, which I don't want to do.
Thoughts? Thanks.