Soda Stream Cylinder Adapter Converter to W21.8 Aquarium Fish CO2 Tank Regulator
This unit is made from brass, not Aluminum. The robust design and manufacture will last a lifetime. A cost effective way to provide CO2 to your Aquatic plants with out the expense and bulk of a large cylinder. Soda stream cylinders are cheap and readily available and easy to replace/fill where as CO2 cylinders are not.