Here it is inspired by the hoftiezer version of the CO2 reactor. One difference is that i used a 2" male and female adapter instead of a clean out tee. This way i can have straight access to the tube should i ever need it. It also should be noted that the 1" pipe connecting both chambers (where my temp probes are attached) is removeable (threaded coupler on each end) so that i can use either chamber seperatly should i ever want. I used some extra visi-therm suction cups to help center the heater better in it's tube. The only down fall is that it's bigger than i wanted, but it still fits in my cabinet.
The first pic shows a temporary rig that i use with my co2 tank before i built the reactor.
Second pic shows the unit after i hooked it up to the sink to check for any big leaks.
Third pic shows it in use. With a "just in case" towel should any slows leaks appear....again

, what a pita.