Get a one-inch diameter pill bottle and six feet of 3/8 inch outside diameter neoprene tubing (from the hardware store @ 10 cents/foot). Drill, cut or melt a hole in the bottom along the edge big enough for a tight fit on the tubing (it doesn't need to be airtight). Stick the tubiong about 1/4 in into the hole
Find a 1/4 in dowel or chopstick or plastic stick (from a coat hanger, maybe) and tape it along the side of the pill bottle and, up higher, to the tubing.
This combination has served me well in siphoning and vacuuming my small tanks. Strong enough suction to lift mulm and debris from the gravel without clogging. Fast enough to siphon water changes in anything up to 5gal. Soft enough not to tear up plants nor to endanger nor frighten the fish.
I promise, someday I'll take pictures and make an info thread. Btw, this basic idea was originally posted here by Old Fish Lady. I just refined the sizes to suit my application.
Last edited by Hallyx; 05-05-2012 at 04:21 AM.