The BH-100F is a more advanced designed of the BH-100. This model has the pump built inside the skimmer body so that only the plumbing pieces can be seen from the viewing area inside the aquarium. It also has an additional baffle area that allows for mechanical filtration media to be used. 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.