CO2 (carbon dioxide) is utilized by calcium reactors to dissolve media and release calcium into the reef aquarium. And, since nearly half the dry matter of any plant is carbon, CO2 is also a popular plant nutrient for freshwater planted tanks.
Discover a new way of helping your protein skimmers and refugiums to gain access to your aquarium water with the Tunze Pressure Regulator 7077/3 for CO2 from Pet Store . This is similar in appearance to your regular gas regulator... Learn More