I have a bunch of the round filter pads; they didn't fit my 2217 filter. I also have silicon tubing, light green for use with C02 or 02. I have two male gardneri killifish, 1". I could use another filter, hang-on or otherwise. Susan _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member