Hey Cathy,
I saw that you also had a question in another thread regarding CYA:
What if we don’t have a skimmer yet as I’m unsure how to install it. How much Cyanuric acid is necessary for the 32 x 16 pool? Not everyone says to add this. Added salt and now waiting 24 hrs.
I'll reply here, probably best to keep your questions in your thread, rather than "hijacking" someone else's.
The best way to add CYA, is the following, as described in TFP's
Wiki:
Solid stabilizer is best added by placing it in a sock or nylon and hanging that sock in front of fast moving return(s). Shaking and squeezing the sock while in the pool water will help the stabilizer dissolve faster.
Alternatively, the sock can be placed into the skimmer basket BUT it should only be left in there if the pump is continuously running and not turned on and off by a timer. CYA is acidic when it dissolves into water and so it is not a good idea to leave the sock in the skimmer without the pump running.
Pouring granular CYA into the pool directly, or into the skimmer as recommended on stabilizer bottles, is not recommended as it takes a long time to dissolve and the granules can sit against the pool surface creating locally low pH levels.
The pump should be run for 24 hours after adding solid stabilizer and you should avoid backwashing/cleaning the filter for a few days if stabilizer was added to the skimmer.
CYA protects your chlorine from being broken down to quickly by exposure to UV (sun). It basically keeps some of the chlorine bound so it's protected from UV. Once the remaining active chlorine is being used or broken down by UV, the CYA releases some more. Think of it as a chlorine reservoir. Because some of your chlorine is bound with CYA all the time, your chlorine is a little less effective at keeping particularly algae in check. That's why you need to maintain higher chlorine levels the more CYA you have in your water. Even though you will have have more chlorine in the water, this is not dangerous, because most of the chlorine that your chlorine test will show, is in a bond with CYA, where it is not aggressive.
This is something that many pool stores fail to acknowledge (or even know). They will tell you that you need CYA to protect your chlorine. But they won't tell you that you need to adjust your chlorine level to your CYA level. Consequently, most pool owners that follow pool store advice will have an algae infestation sooner or later. This is great for the pool store, because they can sell their customers heaps of stuff (algaecides, phosphate removers, clarifiers, flocculants, ...) that will temporarily clear the pool, but not fix the root cause: There is not enough chlorine in the water.
That's how many people ended up on this forum: They followed pool store advice and had never ending algae problems, until they found TFP. You are in the lucky situation to follow TFP from the scratch.
More details you will find here, including a short video that will explain what you need to know for now:
Managing your cyanuric acid and Free Chlorine levels is key to stabilizing your pool. Learn how these two items affect each other.
www.troublefreepool.com
Follow the table for SWCG pools (SWCG = salt water chlorine generator). I wouldn't add it all at once. It dissolves very slowly, and you want to avoid overshooting on CYA. I'd suggest to first add enough to get to 30ppm. For your 14364 gal pool, this will be about 58 oz of dry stabilizer. Verify with the CYA test in your TF-100 kit that you really reached 30ppm, this might take a couple of days. I'd suggest to add some liquid chlorine to have enough chlorine for this CYA level straight away. Once your up and running, you can increase the CYA slowly to the level recommended in the chlorine-FC table.
Recommended levels for all the other pool chemicals apart from CYA and chlorine (that are covered by chlorine-FC table) you can find here:
Use our tool to find ideal chemical levels for any swimming pool. Check TFP recommended levels on pH, free chlorine, cyanuric acid, and more.
www.troublefreepool.com
How much you need to add of a chemical you can calculate with the PoolMath app (that's how came up with 58oz of CYA - no rocket science, just PoolMath):
www.troublefreepool.com