Sorry, newbie here. I think I got the basic understanding after reading this. But, we just got the hot tub working at my house. The bromine floater is wide open, but I'm not measuring any bromine yet. The spa repair man put a couple onces of non-chlorine shock in there and said it was o.k. for us to use it. We used it last night. Today I read the bottle and the shock says it is not a sanitizer. Now I'm thinking the repair guy was wrong. Can I add bleach and basically have a chlorine spa until I have a chance to get the bromine granules? The hot tub is pretty small. Octegon shape, probaby 6 feet across. Thanks.