Ista Ceramic CO2 Diffuser The Ista round UFO style diffusers are available in a choice of 3 sizes. The ceramic diffusion plate ensures the finest possible CO2 bubbles to give the best absorption into the aquarium water. The small size has a diameter of 35mm, the medium is 42mm and the large is 48mm. Please select the size required from the drop down menu when ordering. We also stock the replacement ceramics for these diffusers. Most other brands make you buy a full replacement diffuser instead of just replacing the ceramic part. These diffusers come with a silicate suction cup which assures reliable and firm attachment. The CO2 hose can be fastened to the diffuser in a vertical position which prevents the pipe bending. Ista specialise in planted aquarium equipment and supplies, so you can be sure that this diffuser is one of the most advanced on the market and made to the highest possible quality.
