i have six nu-clear modular canister filters..they are gangable and have 1" inlet and outlets. one of the filters has a cartridge filter and 4 have large bioballs and one is empty. these came on a recent aquarium purchase and i have no use for them at the moment. i dont know alot about them but find lots about them under a google search. i think $50 each is fair and the one with the micron filter at $75. also open to trades for oddball fish! i'll attach a link of new canisters for sale. thanks for looking..open to offers, i dont know much about these..if you can use them, pm me..
http://www.marinedepot.com/Nu_Clear..._100_Gallons-Nu_Clear-NC0522-FIFRCFOH-vi.html
http://www.marinedepot.com/Nu_Clear..._100_Gallons-Nu_Clear-NC0522-FIFRCFOH-vi.html