Stainless Steel CO2 Diffuser 24 mm / 35 cmDimension: W2. 4xL35 cm Dymax Stainless Steel Co2 diffuser uses special ceramic refinement. The quartz plate has a good ultra fine effect and high dissolution rate that breaks up a steady stream of carbon dioxide into tiny bubbles. These very small bubbles produce a much higher surface area to volume ratio than large ones, making it easier for the gas to be diffused into water.