Just a VERY VERY simple thing that has worked for me on tanks with Undergravel filters and uncomplicated or simple decorations. I always disliked the clear lift tubes. They jump out at your eyes and take away from your fish. Sure you can hide them behind fancy time consuming foam/concrete backgrounds or tons of plants. But if you use a black background, or even paint your tank black(like I do), those clear tubes jump right out at ya! Just go to a sporting goods or golf supply store and purchase golfbag replacement tubes. They arent more than a couple of bucks a piece. These tubes are solid black and will make your lift tubes practically invisible other than the top(water returns) They are just slightly bigger than your lift tubes and will slip over with ease. They block alot of light from your tubes too, so the lifttubes won't get nasty quite as fast too. You can just slide them off for easy cleaning. Plus, on most long tanks the lift tubes are short enough that 1 golf bag tube will easily make 2 lift tube covers when cut in half.