CO2 system Mfrs

   Ultralife makes a fully expandable system, pictures and info are available
on the WWW.  Eheim also has started making a fully automatic system, minus a
tank, both as a stand alone unit and to go with their Executive series of
"system" aquariums though they will not be available in the US in large
numbers for some time.  Contact your nearest licensed dealer (also available
on the WWW at Eheims site) for more info.