?The “static mixer” comes with standard 8 mm air hose connectors and can instantly be connected to the existing air supply. The “static mixer” mixes the air with the water flow. The PVC blades assure an optimum mix of air with the water due to the circulation of the water. Also these blades “smash” big air bubbles, into smaller air bubbles which ensures better oxygen absorption. The static mixer has a relatively low resistance so that economical pumps can be used. Optimum flow 8 – 12m?/ hour, max. flow 20m?/h.