Used API Nexx modular filtration system. This bid is for a filtration pod + 2 additional filter extension pods (that will give you 165GPM) and includes all the original hardware, boxes, hang-on back external pump & some limited tubing. These are pre-assembled, leak-free with new o-rings and use the API filter pouches abundantly found on eBay for cheap. Selling because I downsized my 55-75-90Gal tanks qty.