Look I know it won't work with every tank or even for everyone.doubt it even worth it if you have a short tank.but a 4' long n longer could definitely benefit from filter on ends. The pickup is less noticeable on sides, way better current throughout whole tank without having to buy a powerhead ect. I just thought it might help someone out or give them a idea or to just plain think outside the box a lil bit.filters on the ends of a long tank if your using hob filters just make sense to me. Having to buy a powerhead to circulate half of a tank that your filter should be doing doesn't make sense to me. If your all worried about seeing a lil of your filter on the sides n would rather see your fish shake his lil *** with his back to you then put em on the back where you think they should go!