The aquariums left to right are 180 and 120 gallons respectively with independent filter systems. The window behind receives direct sun most of the day in the summer. The 3 large Plecostomus keep the glass 99% algae free.
The mechanical filter is a deep drawer 2 feet square containing 3 medium density 1 inch thick fiber pads. The biological filter contains 12 gallons of small sized high density "Biofilm Carrier Elements", (Aquatic Eco-Systems, Inc). The sump has 3 pumps moving about 400 gph each. There are two overflow boxes, one is a skimmer type.
The 3 heaters are 250 - 300 watts each. The aquarium temperature is maintained at 77 degrees.
The Ammonia is always at zero. The PH remains under control at close to 6.5. by placing a bag of coral sand or ground up oyster shells in the fiber filter box. In order to keep the Nitrates below 40 ppm, weekly partial water changes are required.