Bubble Magus Automatic Roll Filter ARF-S G2Automatic Roll Filters are highly efficient at pre filtering aquarium water in sump type filter units. They remove coarse and fine particles such as organic waste, food, algae, and anything else that is floating in the water column. Bubble Magus Automatic Roll Filters are widely used by all types of aquarists. They are very popular with consumers at home, commercial use in retail stores and even in public aquariums. This is because they are efficient,