optimizing carboplus system

hi,

since two weeks now, I've been using a carboplus in my 100 gallon tank.
Unlike some others, I very happy with it, and my plants even more!

Problem is, my tank is fairly big (100gallon).

I've been thinking about tweaking/optimizing this little piece of equipment:

----are the bubles that are formed all CO2 (or at least the main part of
that)---?????

If so: I would like to put the carbon plate in an old eheim2213 canister
filter, that operates than only is an CO2 reactor.
This way: all bubbles will be mixed better. The exhaust of the filter can be
brought as low as the gravel of my tank, in order to not lose CO2 there.

What do you guys think about this solution?

Thanx,
teizman