The new 13mm nano infuser is designed specially for nano tanks and small aquariums where space is limited. It is our first device that combines an inline diffuser with an outflow in one single piece for an elegant, clean look. This reduces the number of tubing connections and minimizes the amount of equipment inside your tank. The diffuser unit has a 20 mm diameter diffuser disc at the center encased within a glass chamber. The solid glass support point for the center piece allows higher flowrates to be used. The CO2 injection port also acts as a built-in bubble counter to help monitor the CO2 flowrate. The unit also has two built-in attachment points for detachable suction cups and can be securely attached to the side of the tank. Supplied with two suction cups.