Product Name: Bubble Magus Roller Filter ARF Series Replacement for Aquarium Fish Tank Auto Fleece Sump Filter For ARF and ARF-G2 Series The filter is a high-efficiency water filtration system which effectively removes suspended particles such as detritus, food, organic waste from the water column. The ARF series removes the need for filter socks. Water is fed into the internal chamber via the aquarium systems drain, and through the filter roll. When the water level rises in the chamber due to filter clogging the water level switch triggers the motor to wind on the filter roll to a new fresh piece. The water level will then drop repeating the process Use in marine aquariums, freshwater aquariums and corals system.