but can't find the following, so I think I have to make do without both of these chemicals.
1. cyanuric acid
If you ask for cyanuric acid or CYA at the business or pool store, they may not know what you're talking about. CYA is sold as "chlorine stabilizer" or "pool conditioner."I have spoken to a pool store, was told that the chlorine tablet that they are selling content cyanuric acid. So I think I will have to use the tablet for its cyanuric acid together with my SWG. Need some experiment, trial and error to dial in on the SWG setting and also the tablet chlorine dosage in order to get enough of FC and CYA in the pool.
5. Are you sure about that 5900 salt level for your SWG? That's nearly double what some SWGs need.
Be sure not to turn on your SWG until the salt is well mixed in, or you could damage it. At least 24 hours and personally I'd wait at least 48. From the sound of your CYA-from-tabs plan, you might not need to turn it on for quite a while anyway, but just make sure you keep it offline (even unplugged) until you're sure of your salt level and that it is well distributed.
Regarding the "raise FC by 132," just don't do it all at once. Use the tabs in a normal way, to maintain your normal, target FC, until you reach your target CYA, then stop using tabs and switch on the SWG. Going forward, test for CYA periodically and when it drops, repeat the process: switch off SWG, go back to tabs for a while, etc.
Thanks for your advise!Great question. Yes, wait on the salt, for the reasons others gave you and this one: the stuff you're adding now: chlorine and acid and tabs, etc, will contribute to your salt level. So if you add all the salt you need now, by the time you're ready to turn on the SWG, you'll have a bit more salt than you need. Remember, ideally you want to start with just enough salt to keep your SWG happy. So just run a fresh water pool for now, and when your CYA gets to the right level, add the salt. Let it mix in well for a few days, then stop using tabs and start up the SWG.
When it's time, use Pool Math to calculate how many bags to add to reach your target level. But don't forget to test your salt level first, so you can back that amount off. Don't assume you have zero salt. There might be some in your fill water, and like I said, you'll have some from the other chemicals you'll be using.
You're doing great, by the way!