"Aquario Neo Co2 Diffuser Special Extended The Neo diffuser from Aquario features microscopically small holes resulting in very fine and thorough bubble diffusion. The microbubbles produced allow for better Co2 dissolution in your water column, effectively allowing aquatic plants to absorb Co2 properly. Sleek and sturdy, the Neo Diffuser is made from transparent acrylic and is not easily broken when performing aquarium maintenance. Similar to other diffusers, users are able to place it in the corner of a planted aquarium securely with the provided suction cup. Aquario Neo Extended versions can be heat bent over the rim of your tank! Please watch the video at the end of this description on how to do it! Product Features: Full improvement (angel, joint, length, diffusion area) Reduction of back-flow pressure Smaller bubble than existing products Hard-to-break, elastic PC (poly-carbonate) pipe The overall length of 38 Cm (15 inches) Available in 3 sizes Small Up to 20 gallons (38 cm) Medium 20-40 gallons (38 cm) Large 40+ gallons (38 cm) Components: 2 suction cups 2 practice pipes. Rubber for bending Larger diffusers can be used in smaller tanks. "