Red Labe Protein Skimmer
The dirt in the pond from bacteria and enzymes break down into small particles, so small that the protein eventually dissolves into the water. A mechanical filter can not remove these particles. A protein skimmer removes them before they are broken down further into more harmful substances(ammonium, nitrite, nitrate, phosphate etc) Proteins assemble at the interface between air and water.
The water is mixed with the air through a venturi system. Then the water / air mixture is spread over a bio wheels. This increases the surface area, causing the protein to form a solid foam. The foam is finally stripped from the pond water and dispersed from a 40mm outlet.