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CO2 "Kill" Tank/Chamber

V

viper69

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Hi there,

I'm looking for a good design, meaning simple for a kill chamber using CO2 to kill mice or small rats.

I have 1 design, it's OK, but I'm wondering what else is out there.
 
Mr. Gregg's design is much more professional than mine but here are some instructions I wrote up a long time ago for the one I have been using for many years.
CO2 Chamber for Dummies
written by the king of dummies
John E Dove

1. Get one of those tall plastic 5 – 7 gallon buckets, the type with the removable lid. The one I use is about 18 inches high and contained motor oil at one time.

2. Slit the provided slots around the sides of the lid so you can take the lid off and wash out the interior of the bucket.

3. Now get a 39oz Coffee can also with a plastic lid.

4. Place the coffee can on top of the plastic bucket lid and draw a circle around the coffee can on the plastic lid.

5. With a very sharp knife cut out the marked circle. You will want the coffee can to fit fairly tight into this hole so cut on the inside of the circle line you have drawn. You can always trim it larger if needed but you cannot put the plastic back once you have cut it away.

6. Drill two holes just large enough to screw in a sheet metal screw about 1 inch down from the top of the can in opposite sides in the coffee can.

7. Drill large holes in the side coffee can about 3 inches down from the top all the way around. This will be where the gas escapes into the chamber. I made my holes ½ inch in diameter and spaced them one inch apart.

8. Insert two sheet metal screws ½ way into the pre drilled holes 1 inch from the top of the coffee can.

9. Insert the coffee can into the hole made for it in the plastic bucket lid until the screws come into contact with the plastic lid.

10. Get some dry ice.

11. Line the bottom of the bucket with some paper towels to absorb any urine the rodents will leave when they are dieing.

12. Put rodents in the bucket.

13. Place plastic lid, with the coffee can inserted, on the bucket.

14. Pour about ½ - 1 cup of water into the coffee can. I am not sure if this is needed but it hastens the CO2 reaction.

15. With a pair of tongs place about ¼ - ½ pound of dry ice in the water in the can.

16. Place the lid on the coffee can and wait.

Give it till the dry ice is gone or 10 minutes whichever is greater and the rodents will be dead.
It actually takes about 5 minutes or less for a large rat to die but they lose consciousness much sooner. For some reason the younger the rat the longer it takes but don’t ask me why.
 
FYI - if you buy the tanks at Lowes (in the tool section), they come 80% filled and are about the same price as an empty tank elsewhere.

Bart
 
bsharrah said:
FYI - if you buy the tanks at Lowes (in the tool section), they come 80% filled and are about the same price as an empty tank elsewhere.

Bart
Click to expand...

Hey Bart,

Thanks the only place I knew of CO2 tanks were from paintball suppliers. Why would Lowe's sell CO2 tanks?? For gardening?
 
viper69 said:
Hey Bart,

Thanks the only place I knew of CO2 tanks were from paintball suppliers. Why would Lowe's sell CO2 tanks?? For gardening?
Click to expand...

They are in the pnuematic(sp?) tool section and used as a "portal power source" for air tools. The torch section has tanks as well, but they are not CO2 and will kill more than just the rodents.

Bart
 
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