UNIS CO2 controller questions

Hi All, just got the above and was after some advice, i was thinking of using a fire extinguisher as a source does anyone know if the thread diameter is ok, ie remove horn and replace with controller i believe the UNIS is 22mm thread.
also any other suggestions for source? and what pipe inner and outer diameter fits the output? dont want to use the flat stuff, pipe direct to circulation fan was what i am after.
thanks in advance
good growing
GG
 
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