Product details of DOPHIN H80 HANG ON FILTER: - Pumps 190L/Hr(50gallon per hour). - 3 stage filtration,mechanical,chemical and biological. - Eliminate toxin on contact. - Special carbonized poly-fibre with dual action for mechanical and chemical filtration. - Bio cartridege enhances biological filtration and garanties optimun conlonization of nitrifying bacteria. - Wet/dry exposure generates more beneficial aerobic bacteria. - Filtration efficiency improves with age. - Install in minutes,self-starting design. - Requires no motor maintenance,never need oiling.