Dymax CO2 Glass Atomizer is made of highly crystal clear material with a high quality ceramic disc to provide optimum diffusion of CO2. It is a durable atomizer and compact in size and thus easy to install. It should be place at the bottom of the tank in order to obtain its optimum 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. This is the most conventional type of in-tank diffuser; effective if used properly. Ideally, you should aim to achieve a fine stream of mist. Requires more servicing than inline devices due to exposure to tank environment. It has more weaknesses compared to other methods. Atomizers require higher working pressure regulators to work.