How much stabilizer do I need?

The SWCG manual says to use 1.3lbs of CYA for 5061 gallons, but doesn't say what level CYA that brings it to.

Surprisingly, 30 ppm.

I added stabilizer at setup but only the minimum amount and use bleach with a few 1 inch hth ( I got them free) tabs when I know pool will be used heavily and it appears to be working for me. I am not losing that much now I did once a week ago but it has stabilized now. I know nothing about the SWG