Help with calcium reactor

[Bacon505]

Where does this check valve go and which direction thearrow on this point to?
I got my carbondoser electronic regulator that came with this check valve.
Another question is- my geo reactor also come with a cheap check valve, should i use both or just one that cane with the regulator?

 

[Water Dog]

The arrow should point away from the regulator and toward the reactor as that is the direction you want the CO2 to flow. I don’t have a problem using both check valves, one near the regulator and the other near the reactor.

 

[Bacon505]

Ok thanks