DYMAX CO2 Atomizer (Acrylic)Dymax CO2 Acrylic Atomizer CA 112 is made of high quality acrylic clear material and is equipped with a high quality ceramic disc to provide optimum diffusion of CO2. It is durable and compact in size and easy to install. It should be place at the bottom of the tank in order to obtain its best result. When the ceramic disc is blocked, simply soak it into bleach water for 3 to 5 minutes then rinse with tap water and re use again.