So I have the 2.5 Gallon Chlorine Jugs and Pool Math's largest jug size is 182oz. I thought the 2.5's were pretty common outside of box store bleach. At my local Leslies I can usually get my 2.5's filled 2 for $8. I would love Pool Math to be able to tell me how many jugs I need to use to chlorinate to SLAM but it would need a 320oz option. I am good enough at math to do my own calculations but it would be nice if Pool Math could show me quickly.