A Guide to Using CO2 in Your Aquarium | TFH Magazine
Author: Jay Hemdal
Everyone who has taken a sip of soda knows that gases can be dissolved in liquids. Aquarium keepers also know that their fish require proper amounts of oxygen dissolved in their aquarium’s water for the fish to survive. Advanced aquarists are also familiar with the uses for another gas, carbon dioxide (CO
2), which is used as a nutrient for growing plants in freshwater aquariums and as a means to reduce the pH of seawater flowing through calcium reactors in reef tanks.
Carbon dioxide can have another effect on aquariums, though, resulting from the level of CO