| CPR Wet / Dry Filters CPR SYS 500 includes CR 500, CS 50 overflow, hose kit, Rio1700 return powerhead and IF75 inflow kit.CR 500: Recommended for aquariums up to 60 gal. Includes two gallons of filter media. Overall size: 16" x 8" X 12" Inlet / Outlet: 3/4" / NoneCS 50: For glass or acrylic aquariums up to 60 gal. Flow rate 300 gph. 6.5" wide 3/4" bulkhead outflowA built in overflow is the most efficient method of draining aquarium water to a filter. If your aquarium does not have built-in overflow, CPR Continuous Siphon Overflows/Prefilters are the best means for getting water from an aquarium to a filter system without expensive modifications to the tank. They quietly skim up to six times more water than units with tubes.The advantages of CPR Continuous Siphon Overflows/Prefilters include: Adjustable water level allows you to easily change the level in your tank. Black top reduces algae growth. Plastic screen to prevent fish loss. Quiet operation. |