Reef Octopus Aquatrance 3000s Skimmer Pump w/ Pinwheel Impeller Cost effective Octopus Protein Skimmer Pumps provide exceptional performance at an economical price. Direct replacement pumps for newer Reef Octopus Classic protein skimmers modified with large grey threaded outputs. Replacement pump for the following Reef Octopus skimmer models:CLSC-200INT (NWB 200), CLSC-200EXT (DNWB200), Diablo 200, Extreme 200, Diablo 225*, Classic 225*, SRO 3000int * Requires special output adapter to mate to skimmer body.