Hi and thanks for providing this site and all the information it provides. I'm a relatively new pool owner, 3rd summer coming up, still learning how to maintain it. I live in AZ and my pool is salt water, 10K gallons.
I had an issue with the SWG, it was reading low salt, so I added salt. When I took some water in for testing the salt level was over 5K. The Hayward tech came out and checked the cell and found the sensor was coated with calcium and needed to be cleaned. SWG is working now. I was told in order to lower the salt level I needed to remove some water out of the pool. I decided to empty it since the water was going on 3 years. I'm in the process of refilling the pool. I was told not to add anything to the pool, just run it for a few days that way, then take a sample in for testing. I was wondering if that's the way it should be done or not.
Any suggestions on how to remove the calcium ring around the pool? I tried using a spray and pumice stone recommended by the Ace Hardware pool guy but it didn't do much good.