Added my CYA via the sock method two weeks ago. Tested my level this morning and the black dot is still easily visible at 30.
According to the Pool Calculator, adding 4lbs. 9oz. (which I did) should have gotten me to a level of 40. I'm thinking it's somewhere around 20.
There have been a few rain showers that may have added an inch or so to the pool.
I have not cleaned my filter or anything either.
I guess I should add more?