Mantis Media Reactor MR 150-S is equipped with a controllable feed pump and can hold two different filter media. It is perfect for use with activated carbon, GFO or Bio-Pellets. High-volume up-flow design with easy assembly. MR150-S - is recommended for aquariums of 300-500ltrs. DIMS: L130 x W135 x H480mm, Diameter 90mm, Total media capacity 2000ml.