Simply place the skimmer on the back of the aquarium, mount the pump in place as the instructions list and it is ready to skim. The Reef Octopus® skimmers are powered by the Hailea OTP pumps. They are built with high quality acrylic. The Octopus skimmers uses metric plumbing parts. The pump has an improved venturi design and pinwheel impeller.

(manufacturer's description)

These skimmer are available in single pump and dual pump rated for different sizes aquariums.