So I have been getting interested the the BBB method. I checked out the Pool Calculator and downloaded the iPhone app today.
I decided to run over to my grocery store to check prices on bleach, borax, etc. All of the bleach I found (went to multiple stores) was 8.25%. I notice on the Pool Calculator that you can enter any value into the % bleach field, yet in the iPhone app, there are only a few options to choose from...8% being the highest. Now I suspect it could just be an issue with the app, as the last time it was updated was 2011 , but I wanted to make sure I wasn't getting confused here.