that is really neat! you know they'll remove that link as soon as one of the mods sees it. i wonder how well the in tank one would stay on the tank? cuz i already have a flippin hob filter, and my tank is only 10 gal.... or maybe i could just have a small one custom built and drilled, then put hooks on it to make sure it stayed put.... i'll have to look carefully at my tank when i get back to my dorm, i'm working now. lol. that's a really neat idea, i'd never thought of anything like that before.