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Overflow Boxes: CPR Overflow Boxes
Visit the Filtration Overview Page for recommended equipment for reef, saltwater fish only and freshwater tanks, and for some basic aquarium filtration theory.

We highly recommend viewing The CPR Aquatics CS Overflow video on the CPR Aquatics Web site.
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CPR CS50 Siphon Overflow CPR Aquatic CS50 Siphon Overflow

Product Code: RCPR04581
If your aquarium does not have a built-in overflow, CPR Aquatic 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 CS50 has a maximum flow rate of 300 gph. This version does not include the lid or the Aqua Lifter pump. Outflow size: 3/4" bulkhead.

Our Price: $75.99
In Stock
CPR CS50 Siphon Overflow CPR Aquatic CS50 Deluxe Siphon Overflow w/ Lid & Aqua Lifter Pump

Product Code: RCPR04586
If your aquarium does not have built-in overflow, CPR Aquatic 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 CS50 has a maximum flow rate of 300 gph. This version DOES include the lid and the Aqua Lifter Pump. Outflow size: 3/4" bulkhead.

Our Price: $96.49
In Stock
CPR Aquatic Lid for CS50 Siphon Overflow CPR Aquatic Lid for CS50 Siphon Overflow

Product Code: RCPR04111
The CPR Aquatic Lid for CS50 Siphon Overflow.

Our Price: $7.29
In Stock
CPR CS90 Siphon Overflow CPR Aquatic CS90 Siphon Overflow

Product Code: RCPR04981
If your aquarium does not have a built-in overflow, CPR Aquatic 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 CS90 has a maximum flow rate of 600 gph. This version does not include the lid or the Aqua Lifter pump. Outflow size: 1" bulkhead.

Our Price: $97.99
In Stock
CPR Aquatic CS90 Deluxe Siphon Overflow w/ Lid & Aqua Lifter Pump CPR Aquatic CS90 Deluxe Siphon Overflow w/ Lid & Aqua Lifter Pump

Product Code: RCPR04986
If your aquarium does not have built-in overflow, CPR Aquatic 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 CS90 has a maximum flow rate of 600 gph. This version DOES include the lid and the Aqua Lifter Pump. Outflow size: 1" bulkhead.

Our Price (price includes free shipping!) $120.49
(Out of Stock)
CPR Aquatic Lid for CS90 Siphon Overflow CPR Aquatic Lid for CS90 Siphon Overflow

Product Code: RCPR04112
The CPR Aquatic Lid for CS90 Siphon Overflow.

Our Price: $8.49
In Stock
CPR CS100 Siphon Overflow CPR Aquatic CS100 Siphon Overflow

Product Code: RCPR04181
If your aquarium does not have built-in overflow, CPR Aquatic 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 CS100 has a maximum flow rate of 800 gph. This version does not include the lid or the Aqua Lifter pump. Outflow size: 1" bulkhead.

Our Price: $109.99
In Stock
CPR Aquatic CS100 Deluxe Siphon Overflow w/ Lid & Aqua Lifter Pump CPR Aquatic CS100 Deluxe Siphon Overflow w/ Lid & Aqua Lifter Pump

Product Code: RCPR04186
If your aquarium does not have built-in overflow, CPR Aquatic 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 CS100 has a maximum flow rate of 800 gph. This version DOES include the lid and the Aqua Lifter Pump. Outflow size: 1" bulkhead.

Our Price (price includes free shipping!) $129.29
In Stock
CPR CS102 Siphon Overflow CPR Aquatic CS102 Siphon Overflow

Product Code: RCPR04281
If your aquarium does not have built-in overflow, CPR Aquatic 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 CS102 has a maximum flow rate of 1,200 gph. This version does not include the lid or the Aqua Lifter pump. Outflow size: two 1" bulkheads.

Our Price (price includes free shipping!) $113.99
In Stock
CPR Aquatic CS102 Deluxe Siphon Overflow w/ Lid & Aqua Lifter Pump CPR Aquatic CS102 Deluxe Siphon Overflow w/ Lid & Aqua Lifter Pump

Product Code: RCPR04286
If your aquarium does not have built-in overflow, CPR Aquatic 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 CS102 has a maximum flow rate of 1,200 gph. This version DOES include the lid and the Aqua Lifter Pump. Outflow size: two 1" bulkheads.

Our Price (price includes free shipping!) $138.59
(Out of Stock)
CPR Aquatic Lid for CS100 Siphon Overflow CPR Aquatic Lid for CS100 & CS102 Siphon Overflow

Product Code: RCPR04113
The CPR Aquatic Lid for CS100 Siphon Overflow & CS102 Siphon Oveflow.

Our Price: $9.29
(Out of Stock)
CPR CS150 Siphon Overflow CPR Aquatic CS150 Siphon Overflow

Product Code: RCPR04081
If your aquarium does not have built-in overflow, CPR Aquatic 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 CS150 has a maximum flow rate of 1,600 gph. This version does not include the lid or the Aqua Lifter pump. Outflow size: 1-1/2" bulkhead.

Our Price (price includes free shipping!) $127.99
In Stock