Seachem Laboratories Glass Pollen Style CO2 Beetle Diffus...

The 27 mm glass Beetle Diffuser is a pollen style CO2 diffuser that connects to CO2 injection systems to easily disperse CO2 gas into the planted aquarium. The large surface area of the 27 mm disc allows for the diffusion of large volumes of CO2 gas making the 27 mm Beetle Diffuser an excellent choice for mid-sized aquaria or higher-growth aquaria.