We highly recommend viewing the CPR Aquatics CS Overflow video on the CPR Aquatics Web site for a general overview of all the CPR Aquatics overflows.

CPR Aquatics CS90 Siphon Overflow:
Max. Flow Rate: 600 GPH
Outflow Size: 1"
Bulkhead Width: 8"
Needs 4.5 inches between back of tank and wall

A 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 Aquatics Siphon Overflows 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 Lid for the CS90 Siphon Overflow needs to be purchased separately.

We highly recommend using the Aqua Lifter pump with your CPR Overflow to maintain siphon. You may also want to look at our Wet Dry Filter page where we have recommended packages including the Overflow Box, Aqua Lifter pump, return pump, Wet Dry Filter and plumbing.

The advantages of CPR Aquatics Siphon Overflow 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