The Berlin XL Protein Skimmer (up to 400 gallons) is designed for the large tank enthusiast.  This taller configuration of the Berlin Classic model will handle any tank up to 400 gallons in size. This configuration allows a longer contact time between air and water to greatly increase the protein extraction capabilities of the skimmer. 700 gph pump recommended (not included).

The Berlin Hang-on Protein Skimmer (HO-model) is an adaptation of the Berlin Classic and is designed to hang directly on the tank or sump by way of its easily accessible inlet and outlet tubes. This model is perfect for the hobbyist who has limited space or would prefer not to use a costly sump.  Same great features as the Berlin Classic.  500 gph pump recommended (not included).

The Berlin Classic is the original version of the world’s best selling protein skimmer features the patented Triple pass action in a unique compact design. Suitable for tanks up to 250 gallons. The unit is completely self-leveling and may be installed in or alongside the sump or aquarium. Made from ozone safe materials and designed for easy maintenance. 500 gph pump recommended (not included).