Protein Skimmers Coralvue is manufacturing the standard in Protein Skimmers with the new Reef Octopus Protein Skimmer Line. Octopus Skimmers are available in the stand internal with needlewheel application or go big with the external models. Coralvue is constantly updated on an already great skimmer to make them better so check back for new a great Octopus models often. Reef Octopus Needlewheel In Sump Protein Skimmers Special needlewheel produces more micro bubbles which highly increases the skimming ability compared to our competitor’s models. The real Deal, not like other cheap imitations of the original Coralvue Octopus Skimmer.  Reef Octopus Recirculating Protein Skimmers     Allows the user to input the exact amount of water desired to be skimmed. In Sump or External. These skimmers are used outside of the sump for maximum water contact in the skimmer.