This image shows how the various equipment is arranged behind the concrete background. The red areas show the approximate sizes and locations of the compartments behind the background. Two water inlets were cut in the background at the top left and top right, covered with plastic screen. Water flows through those into cutouts for the filter intakes. The filter on the left then returns directly to the tank. The filter on the right returns behind the background into a compartment with a powerhead and heater. The powerhead pushes water across the heater and back to the tank through openings below an overhang. (12/2004)