Hey all,
I don't like using it but once in awhile I have overproduction. Here's some shots of the chamber. It works fantastic on a very slow trickle and the rats are euthanized peacefully. I used a soldering iron to make the hole in the tub. If you cut or try to drill it you might split/crack the tub.

10lb CO2 cylinder


3/4" inner diameter hose and hose clamp


PVC hose coupler


Matching holes on both sides so the denser CO2 can press the O2 out of the tub


Hose installed on coupler


Inside/Outside shot of hose installed on coupler


Tub ready for rodents


Hope it helps! Message me if you need any info or instructions.

Regards,

B