There is a glitch with android where the keyboard blocks the chemical addition info area towards the bottom. Press 'done' to minimize the keyboard and see the area underneath it.
Only add 10 CYA though, not 20.
That's OK. It takes a minute to get your pool sea legs back.
Dose to 8 FC everyday for now until you see several days respond the same to know what your current daily loss is. So if you find a 5.5, add 2.5. (Etc).
You will have to test after to confirm while the old bleach lasts. Once you're using this years supply, you can just trust its good.