SHARK are exclusively designed internal filters with a patented magnetic quick coupling system. These modular designs allow the option of adding one or more filtering compartments to increase the filtration capacity. Shark Pro takes this functionality to the next level with multiple output settings and a Dynamic Filtration System that allows expansion without reducing flow rate. Modular system: independent module with filter media Multi-stage filtration: 50% filtration surface Optional: Extra modules to upgrade mechanical and chemical filtration 4 water flow options: Unidirectional, Multidirectional, Spray bar, Oxygen enrichment with venturi MAGNETIC CONNECTION SYSTEM – Rated for up to 6 mm (0.25) submersible external magnet Flow regulation also Works Kit flow accessories included in turtles kit (horizontal positioning)