CPR Aquatics

Deluxe CS50 Overflow with Lid and Aqua Lifter

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A built-in overflow is the most efficient method of draining aquarium water to sump filtration. 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. CPR Continuous Siphon Overflows are used to transport water from the tank to your sump. Deluxe models include the aqua lifter to help maintain a full siphon.They quietly skim up to six times more water than units with tubes.



  • 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: All units except the CS150 come with slip screen, sponge and vent tube to help reduce noise.
  • Aqualifter Pump and acrylic lid included for quiet operation.


Selecting the Correct CPR Overflow


CS50 Specifications:

  • Flow Rate: 300gph
  • Outflow Size: 3/4" Bulkhead
  • Width: 6"
  • Dimensions (see photo): A: 6.5", B: 7.5", C: 1.5", D:1.25", E: 3 7/8" , F: 4.75", G: 7.25", H: 5.5", I: 3.5", J: 2.75", K: 3"


 Owners Manual

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Product Questions

What is a good return pump to pair with the cpr cs50
Question by: Dj on Dec 29, 2016, 7:34 PM
Hey there,
The CS50 is rated for a maximum of 300gph of flow, so a pump that will deliver within this range would be necessary. Something like the Sicce 1.5 or 2.0, depending on your head height, would likely be a good option for a return pump.

Have a great day!
Answer by: Zack on Jan 10, 2017, 2:11 PM