Aquatop MR-30 Media Reactor w- Pump - 152 GPHAquatop MR 30 Media Reactor w Pump, 152 GPH This powerful reactor uses a reverse water flow design that prevents water from channeling through the filter media, thus maximizing the efficiency of filter media. Constructed of high quality acrylic with an easy to remove lid, the MR Series can be installed either in sump or hang on the tank and comes complete with all plumbing parts. This versatile reactor can be used for phosphate resins, phosphate