MarineLand PR3340 Pump/Filtration Assembly for Eclipse System 3, Hex 5, Corner 5 PLEASE READ: This is a PART will NOT work without an impellor. This is a replacement part and does NOT come with an impellor (PR3342) or the impellor/intake tube cover (PR3341). Please keep your originals or buy a new one. For use with multiple Eclipse Systems (See Title). Properly working pumps and filters keep water clean and clear, and help with overall aquarium health.