Reef Octopus Regal 250EXT Recirculating Protein Skimmer250 EXT Advanced Control Recirculating Protein Skimmer The new and innovative Reef Octopus Regal 250 EXT recirculating protein skimmer supplies powerful filtration for aquariums up to 600 gallons where absolute control is necessary. The Reef Octopus Regal 250 EXT is constructed of high quality cast acrylic that disassembles completely for cleaning. Its hybrid conical body naturally stabilizes and concentrates the organic rich foam as it rises. This