are you talking about something like this? or am i reading this wrong?kinda vague. i can not seem to get the link. you will have to go to ebay and enter the following.
pro diy co2 kit system with gauge needle check valve
or are you talking about the homebrew soda,carbonated bottles?
forum community dedicated to tropical fish owners and enthusiasts. Come join the discussion about species,breeding, health, behavior, aquariums, adopting, care, classifieds, and more! Open to fish, plants and reptiles living in freshwater or saltwater environments.