Replacement Red Sea Max 250 Skimmer Pump Impeller for the Red Sea Max 250 Aquarium. This impeller will only work for the Red Sea Max 250 Skimmer Pump made by Sicce. It will NOT work for the Skimmer Pump made by Hydor. For the Hydor Skimmer Pump you will need to purchase the Red Sea Berlin X2 Protein Skimmer Replacement Turbo Impeller.