[Left C]

If that thing is the best CO2 regulator, it looks like to me that they should at least spell CO2 correctly. They wrote Co2 and co2 in their description and they never wrote CO2.

If they can't spell it right; would you think that these folks made the very best product?

 

[Left C]

For my money, I'd get one of these brand new Victor dual stage chrome plated medical grade CO2 regulators and add an Ideal or Swagelok metering vlave. You can also add a Clippard or Burket solenoid or any other brand solenoid too.

Regulator: http://shop.ebay.com/merchant/mrmotorcycles_W0QQ_nkwZQQ_armrsZ1QQ_fromZQQ_mdoZ

Metering valves:
http://www.greenleafaquariums.com/co2-regulators/ideal-co2-regulator.html
http://www.sumoregulator.com/
http://www.bestaquariumregulator.com/CO2.html#needle

Solenoids:
http://www.greenleafaquariums.com/co2-regulator-solenoid.html
http://www.bestaquariumregulator.com/CO2.html#solenoid