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Aquarium Supplies
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Overflow Boxes

Manufacturer
CPR Overflow Boxes
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.
Tom Aquatics Pro Series Surface Skimmer Overflow Box
The Patented Surface Skimmer Overflow efficiently skims the surface water of the aquarium, removing dissolved organics and other waste material.
CPR RSS Overflow Box Retrofit Surface Skimmer
The RSS Overflow is a simple way to add a surface skimmer to any tank with a bulkhead mounted overflow. Users can choose between the regular unit or the DX model depending on the installation method they desire.
External overflow boxes drain water from a display tank into a sump or wet/dry filter when paired with an aquarium that did not come pre-drilled.

We carry several sizes to assure you’ll we’ve got the right overflow box for your flow rate.

Don’t forget to add an Aqua Lifter Vacuum pump or a powerhead with venturi capability (Maxi-Jet powerheads are a customer favorite) to ensure your overflow box maintains the proper siphon and restarts automatically following a power outage.

Built-in overflows are the most efficient way to drain aquarium water into a filter. If your aquarium does not have a built-in overflow, an overflow box is the best alternative for getting tank water into a filter system without spending a fortune on tank modifications. They also skim up to six times more water than units with tubes.

Overflows/Pre-filter Advantages:
  • Easily adjust aquarium water level to precisely the right amount for your setup
  • Plastic screens help prevent fish loss
  • Quiet operation

This item is temporarily unavailable but will be back in stock soon.

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