 Place the grow bed portion of the plastic container onto the pallet making it as flat as possible. If the original top opening or portion of the cap keeps the grow bed from being flat you may want to cut out an opening in the pallet. This hole can be cut using a grinder with a cutting wheel. When operating the grinder wear appropriate safety gear. Next identify the lowest and flattest portion of the grow bed bottom. This is where the drain will be located. Make sure to choose a spot far enough away from the edges so that it will drain over the fish tank when the grow bed is positioned atop the tank and in a location that has a relatively clear passage to the tank below. Mark this spot and drill a 1 and 3 quarter inch hole in the grow bed and threw any metal on the pallet. Fit the 1 inch uniseal into the hole in the bottom of the grow bed tray. Cut a 10 inch piece of 1 inch PVC pipe. Lubricate the uniseal with the silicone to help the pipe slip through the hole. Push the 10 inch piece of 1 inch pipe through the uniseal leaving about 5 inches above the bottom of the grow bed. Next create the support that the grow bed will rest on. Place 2 by 4's across the top of the cage so the ends extend several inches on each side. IBC totes come in different sizes. Our cage measures 40 inches in one direction and 48 inches in the other. If you have a different size IBC tote you may have to adjust the lengths of the support boards. Lift the grow bed and set it on top of the supports with the long side across the top of the cage. Maneuver the support boards to create a stable base for the grow bed. You can slide the grow bed beyond the back edge of the cage to give you more room to access the fish. Locate the stand pipe that comes through the bottom of the grow bed and add a 90 degree elbow pointed toward the middle of the tank. Add a 14 inch piece of pipe to the elbow. The elbow and additional pipe create a small amount of back pressure that makes it easier for the siphon to get started once the water overflows to the grow bed stand pipe. When complete this 8 inch tall grow bed is designed to hold 6 inches of gravel or clay balls and support 20 to 35 plants depending on the spacing.