Thanks JohnMTC ProCal or possibly the MiniCal. Pair that with the aquarium plants regulator and your good to go.
http://www.aquariumplants.com/mobil...rbonDoser_Electronic_Co2_Regulator_p/co2.htm=
http://marinetechnical.com
The reactors come up every now and then on the different forums for sale. And if I'm not mistaken I've seen a MiniCal on RC in the last few days.