[leoslizards]

Could any of these tanks work as a pressurized Co2 system for a planted tank?

10 GALLON AIR TANK

A normal 40lb grill/BarBQ propane tank

A fire extinguisher

Also, could they be mounted horizontally?

 

[Rex Grigg]

See #15 in the CO2 section at The Planted Tank FAQ


It will answer the question about the first two.

The third one it won't but chances are it will not work. If the normal operating pressure of the fire extinguisher is 125-150 psi then it won't. And the type of FE you linked to is almost alway a pressurized dry chemical type. Those are welded tanks.

A CO2 cylinder must be mounted vertically. You can't allow liquid CO2 into the regulator.

 

[leoslizards]

Ok, Thanks for the info Rex.

 

[mrbelvedere]

Often, fire extinguisher shops retrofit old extinguishers as CO2 tanks. That's how mine are.

Price can be variable. Where I'm from you will pay at least $85. CO2 refills are also $19. Ridiculous, I know.

 

[BlueRam]

That should read "Often, fire extinguisher shops retrofit old *CO2 based* extinguishers as CO2 tanks." The picture is of an ABC type.