Sorry, no pictures. But basically I made a grid out of 1" pvc piping. 4 lengths of piping running across the length of the tank 4 elbows (one in each corner), and 4 tees (2 on each side for the piping in the middle of the grid). Drill holes or cut slits in piping to allow water to enter. An additional tee is placed on the rear piping. Put a vertical piece of tubing in the tee. Attach the intake of the aquaclear to the vertical piece of tubing. Simple and works great.
Here is a picture of something similar but a bit more complicated: http://www.flowerhorncraze.com/topic/8735-diy-under-gravel-filter/
