Does a bubbler add CO2 to an aquarium?

Using a bubble stone (bubbler) to supply oxygen and inject CO2 into plants can actually reduce the dissolved CO2 in water. When the bubble stone adds oxygen, it causes surface agitation, leading to the loss of CO2. The increased agitation accelerates CO2 off-gassing, decreasing the available CO2 for plants. In a planted aquarium, maintaining a balance between oxygenation and CO2 levels is crucial for optimal conditions for both fish and plants.

A CO2 diffuser and an air bubbler serve distinct purposes in aquariums. A CO2 diffuser is specifically designed to release carbon dioxide into the water to benefit aquatic plants during photosynthesis. It ensures a controlled and efficient distribution of CO2, promoting plant growth. On the other hand, an air bubbler primarily adds oxygen to the water by creating bubbles at the water's surface. While it enhances oxygen levels and surface agitation, it may inadvertently lead to the loss of dissolved CO2, affecting plant health in a planted aquarium. Aquarium enthusiasts need to choose the appropriate equipment based on their specific goals, whether it's maximizing plant growth with a CO2 diffuser or ensuring adequate oxygenation with an air bubbler.