Yes we added more water because the level was low. Now it’s a little above normal. I just added muriatic acid and will check in another hour. The last time checked cya was probably a week ago.How long has it been since you tested CYA? Have you replaced a good chunk of water lately? When you install the SWG raise the CYA up to 70. You can install whenever you want, just keep in mind that until the CYA is raised you will need to keep a close eye on your FC level so it doesn't drop too low. If you want you can go ahead and raise CYA to 30 now and add the rest to reach 70 after the SWG is installed.
Each SWCG cell manufacturer has different salt level requirements. You should have a user manual or perhaps a chart inside the door of your control box that will tell you your salt level range.What does my salt level need to be?
Once you learn your pool, you can test some things less often.Also how often should I perform a whole test of the pool?