Hi, Brock,

Yes, bigger will last longer.

Now, I am concerned you are getting it for the wrong reason. I'm not an indoor pool guy but I think the principles of Cl are the same.

I don't think you should have any smell in your pool unless you have chloramines. That means you shock to get rid of them but, by shocking, the smell goes away.

Are you shocking because you have CC or just as a maintenance item? I have yet to shock my (outdoor) pool in two summers. Is the smell what you are calling "off-gassing". Again, I think that smell is because you've got CC and have not maintained an adequate Cl level to keep them at bay.

Lastly, I doubt you'll get much encouragement from the SWC guys to run @ .5ppm Cl......that's VERY low. But it sounds like you may be approaching the issue from the wrong direction,

Brock, I could be full of it because I know nothing about indoor pools but I'm comfortable with how and why Cl acts like it does.

The smart guys will be along to give better advice than me. I sure am curious to find out the answers, tho.

Dave S.