CPR Retrofit Overflow Box with Backing

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An overflow box is a great way to keep the water level at a constant in your saltwater aquarium as well as increase the rate at which surface water, and the film and dust with it, is removed. CPR Aquatics are high quality, black acrylic and built in the USA. Install by using a bulkhead. Bulkhead size will determine your flow rate.


Sizes Available


  • RSS05DX - 6 3/8" L x 2 5/8" W x 3 5/8" H (Nano tank)

  • RSS07DX - 5 1/4" L x 3 7/8" W x 5 1/4"H (Up to 60 Gallon tank)

  • RSS12DX - 7 1/4" L x 4 1/4" W x 5 1/4" H (Up to 120 Gallon tank)

  • RSS18DX - 12 1/2" L x 4 1/4" W x 5 1/4" H (Up to 200 Gallon tank)

  • RSS24DX - 18 5/8" x 4 1/4" W x 5 1/4" H (Up to 300 Gallon tank)
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  • Quick Overview

An overflow box is a great way to keep the water level at a constant in your saltwater aquarium as well as increase the rate at which surface water, and the film and dust with it, is removed. CPR Aquatics are high quality, black acrylic and built in the USA. Install by using a bulkhead. Bulkhead size will determine your flow rate.

Sizes Available

  • RSS05DX - 6 3/8" L x 2 5/8" W x 3 5/8" H (Nano tank)
  • RSS07DX - 5 1/4" L x 3 7/8" W x 5 1/4"H (Up to 60 Gallon tank)
  • RSS12DX - 7 1/4" L x 4 1/4" W x 5 1/4" H (Up to 120 Gallon tank)
  • RSS18DX - 12 1/2" L x 4 1/4" W x 5 1/4" H (Up to 200 Gallon tank)
  • RSS24DX - 18 5/8" x 4 1/4" W x 5 1/4" H (Up to 300 Gallon tank)
More

CPR Retrofit Overflow Box with Backing

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RSS24DX Extra Large
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Product Questions

What size overflow box would I need for a 46g bowfront tank?
Question by: Bob on Mar 25, 2014 6:52:00 PM
Hi Bob,
The biggest factor is what type of plumbing you plan to put inside of it (and then just make sure you get an overflow large enough to fit it) but for a simple drain on a 46g tank the RSS07 Small should be plenty fine.
Answer by: Bulk Reef Supply on Mar 25, 2014 6:52:00 PM
Does this need to be siliconed to the tank, or will just a bulkhead hold it in place?
Question by: Earnest on Aug 2, 2014 6:33:00 AM
Hi Earnest,
If you use an extra gasket for the bulkhead between the overflow box and tank then you would not need to use any silicone, the bulkhead itself would hold the box in place.
Answer by: Bulk Reef Supply on Aug 2, 2014 6:33:00 AM

Full Details

How to Choose an Overflow -CLICK HERE


Sizes Available

  • RSS05DX - 6 3/8" L x 2 5/8" W x 3 5/8" H (Nano tank)
  • RSS07DX - 5 1/4" L x 3 7/8" W x 5 1/4"H (Up to 60 Gallon tank)
  • RSS12DX - 7 1/4" L x 4 1/4" W x 5 1/4" H (Up to 120 Gallon tank)
  • RSS18DX - 12 1/2" L x 4 1/4" W x 5 1/4" H (Up to 200 Gallon tank)
  • RSS24DX - 18 5/8" x 4 1/4" W x 5 1/4" H (Up to 300 Gallon tank)

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Reviews

2 Items

  • Does the job By Lukas on 8/30/2015

    Solid build, fairly easy to install. Does the job perfectly.
  • Good, solid product By Eric on 1/11/2015

    Got this for my 35 gallon cube. It is built soundly and feels solid. It works well, however, I wish some of the teeth were cut slightly bigger to allow more to flow through.

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