When you do the CYA test, you can pour the sample back and forth a few times to see if you keep getting the same result.
I guess I would assume you are at a CYA of 30ppm. I would lower the pH down to around 7.2-7.4 and then SLAM the pool to be sure the water has nothing growing in it. This may only take 1-2 days if the pool is clean and you can pass all 3 criteria to stop. Once complete, if you are going to run the SWG, then raise the CYA up to the recommended levels, maybe target 60ppm initially and then verify in a week. You can add the salt at any time.
What is the pool surface?
Please add your pool details to your signature and location to your profile as described HERE as it will help us help you.
I guess I would assume you are at a CYA of 30ppm. I would lower the pH down to around 7.2-7.4 and then SLAM the pool to be sure the water has nothing growing in it. This may only take 1-2 days if the pool is clean and you can pass all 3 criteria to stop. Once complete, if you are going to run the SWG, then raise the CYA up to the recommended levels, maybe target 60ppm initially and then verify in a week. You can add the salt at any time.
What is the pool surface?
Please add your pool details to your signature and location to your profile as described HERE as it will help us help you.