Bill uses small airline tubing, He puts a standard sponge filter down in the drainage layer and has his air tubing inserted into it. He also puts a small valve on the end of the tube outside the tank. The valve allows him to start his siphon one time and then close the valve thus preserving the siphon for when you need it again . Remember you want to keep you drainage layer around 1/2 or more of water (just dont let the water touch the soil). The small diameter of the airline tube makes it super easy to conceal.