Don writes: > W/ needle valve- > CO2 cylinder ~~> Regulator ~~> valve (metering, needle) ~~> hose barb > adapter > ~~> tubing going into aquarium ~~> check valve ~~> CO2 di > ffusor/reactor/bubble counter > Don > > Don, where does the solenoid go in here? Thanks. David S. Brown --- StripMime Report -- processed MIME parts --- multipart/alternative text/html ---