[platinumpete]

I have the hagen co2 kit bubble ladder, I was wondering if it is recommended to put a check valve on the tubing between the co2 canister and the ladder.

 

[Rex Grigg]

Always. It's pretty much common sense.

 

[2wheelsx2]

If you use the hanger to hang on the tank, there is really no hydraulic head, so the risk is low, but as Rex says, putting it a check is always the best route.

 

[bereninga]

I hang mine on the back and I think only once has water ever come out of the tubing. It's not that bad since you wouldn't be damaging expensive equipment like a Co2 regulator. You'd just have a bit of a wet floor.