CO2 Inline Diffuser 12/16mm

This compact inline CO2 diffuser is designed for canister filters using 12mm inner diameter and 16mm outer diameter tubing, common on smaller and mid-size canister filters popular in planted nano and medium aquariums. By injecting CO2 directly into the filter's return flow, the turbulence created by the pump ensures near-complete dissolution before water reaches the aquarium, eliminating the need for a glass or ceramic diffuser inside the tank. This keeps the aquascape visually unobstructed and is particularly valued in nature-style and minimalist aquascaping. The compact body fits neatly behind or beneath the aquarium. The internal ceramic membrane produces the fine gas dispersion required for efficient dissolution.