You can add additional CYA using the sock method while you slam the pool. Add enough CYA in the sock to reach 30ppm, and use 30 as your CYA level to calculate FC slam level. For your pool the slam level is 12.
You can add additional CYA using the sock method while you slam the pool. Add enough CYA in the sock to reach 30ppm, and use 30 as your CYA level to calculate FC slam level. For your pool the slam level is 12.