I am not being critical of your post at all. I understand that you are trying to help and I actually do appreciate it. I always appreciate it when someone is trying to help. I am taking all of your advice and considering it during my testing.
I am also glad that kest874 has tried it and given me some real time experience with the regulator.
As kest874 said this regulator does fit the tank.
I have not gotten my tank filled yet so I can't so any testing yet. It looks like my LFS (Dallas North Aquarium) does CO2 fills and it is not an exchange. So I will be dropping by there in the next couple of days to get it filled.
I also bought everything I need for my reactor. It was less than $20 for everything I am going to need. Well, somethings I had, like the PVC glue.
So next question for everyone... I am building a reactor that will be either in my sump or right beside it. Since I am not running a refugium in the sump I am leaning towards having it in the sump. Do I really need to route the water from the reactor directly to the display tank, or can I just release the "infused" water into the sump, somewhere in front of the return pump?