The body of this series protein skimmer is made from UV rated linear low density polyethylene (LLDPE) material, which makes the protein skimmer rugged, ozone safe and UV-resistant, and adopts rotationally molded design, it is once piece, eliminating potential leaking and failures from seams and weld points. Equipped with an automatic washdown system and touch screen controller for a simple and convenient programming of rinse cycles for the internal and external cone. It is designed to carry out the protein fractionation process eficiently and help to save the operation and maintenance cost. At the same time, stocking densities and growth rates are all enhanced and animal health improved.