CPR Retrofit Overflow Box

CPR Retrofit Overflow Box
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  • CPR Retrofit Overflow Box

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 aquarium silicone. We suggest using a silicone color that matches the existing silicone in your tank.


Sizes Available



  • Extra Small - up to 250 GPH

  • Small - up to 500 GPH

  • Medium - up to 900 GPH

  • Large - up to 1200 GPH

  • Extra Large - up to 1600 GPH

More
  • 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 aquarium silicone. We suggest using a silicone color that matches the existing silicone in your tank.

Sizes Available

  • Extra Small - up to 250 GPH
  • Small - up to 500 GPH
  • Medium - up to 900 GPH
  • Large - up to 1200 GPH
  • Extra Large - up to 1600 GPH
More

CPR Retrofit Overflow Box

38% Recommend this to a friend (3 of 8)

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RSS05 Extra Small
SKU: 208179
$36.99
 
 
RSS07 Small
SKU: 208180
$44.99
 
 
RSS12 Medium
SKU: 208181
$57.99
 
 
RSS18 Large
SKU: 208182
$69.99
 
 
RSS24 Extra Large
SKU: 208183
$78.99
 

Availability: In stock

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Product Questions

so im gonna setup a new tank and want to run dual overflow on a 200 gallon setup, would i go with the 2 rss12's ?
Question by: josh on May 13, 2016 8:51:00 PM
Great question! For enough room to work with plumbing fittings we definitely recommend the larger RSS 12's this will allow you to plumb any style system.
Answer by: Connor (Admin) on May 19, 2016 12:29:00 PM
I have a 40 breeder tank could I buy a bigger overflow like the rss12 or rss18 because on the review theres some complaints about water is to much
Question by: Dayton on Jun 21, 2016 2:21:00 PM
Hey there!
As long as your overflow box is large enough to hold your drain pipe pick the largest which will allow for most room. The physical pipe diameter plays a larger role in restriction and as long as 1" pipe is used it can handle up to 600 GPH flow.
Answer by: Connor (Admin) on Jun 21, 2016 3:04:00 PM
What size goes with the 700 overflow lid?
Question by: Evan on Sep 5, 2014 2:54:00 PM
Hi Evan,

The 700 lid measures 3"x3" and we do not currently stock an overflow box that size. Our smallest overflow box is the RSS05. Its measurements are - 6 3/8" L x 2 3/8" W x 3 5/8" H. The RSS05DX is very similar but it has a back on the overflox - 6 3/8" L x 2 5/8" W x 3 5/8" H.

http://www.bulkreefsupply.com/cpr-retrofit-overflow-box.html
http://www.bulkreefsupply.com/cpr-retrofit-overflow-box-with-backing.html

I hope this helps.
Have a great day :)
Answer by: Bulk Reef Supply on Sep 5, 2014 2:54:00 PM

Full Details

How to Choose an Overflow - CLICK HERE

 

Sizes Available

  • RSS05 - 6 3/8" L x 2 3/8" W x 3 5/8" H (Nano tank)
  • RSS07 - 5 1/4" L x 3 5/8" W x 5 1/4"H (Up to 60 gallon tank)
  • RSS12 - 7 1/4" L x 4" W x 5 1/4" H (Up to 120 gallon tank)
  • RSS18 - 12 1/2" L x 4" W x 5 1/4" H (Up to 200 gallon tank)
  • RSS24 - 18 5/8" x 4" W x 5 1/4" H (Up to 300 gallon tank)

 

When choosing an overflow we suggest using the largest overflow box that will fit your tank. It is impossible to oversize an overflow.

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Reviews

8 Items

  • . By week return flow rate on 6/15/2015

    Go next size bigger and save yourself the BS from BRS.
  • not enough flow By Dave on 5/22/2015

    I don't know how they rate by tank size but GPh would be more helpful. My pump puts out about 6x tank volume per hour and the overflow could not keep up. Had to drain tank rip it out and did a coast to coast overflow out of glass. If going with a high flow sump order 1-2 sizes up.
  • Works Great By Jeff on 2/4/2015

    Arrive in perfect condition. Looks great in tank. Easy to install
  • Broken Teeth By Ellis Dehee on 11/18/2014

    Overflow arrived with several teeth broken at the top where they were attached. I'm returning and buying something made from thicker plastic.
  • Buy next size up By Mike Greene on 8/18/2014

    I ended up having to return for the next size larger. The cut out teeth seem to minimize the amount of water the overflow can handle. Just plan to go a size larger and you should be fine.
  • Restricted Flow By Jon Baxter on 7/8/2014

    I bought the RSS12 for my 75 gallon SPS Reef tank along with a Mag12 (1200 gph) return pump. With a 5 foot head the pump is probably pushing around 900-1000 gph. It was obvious right off the bat that the overflow could not handle the flow. I would recommend buying one size up to compensate for the calculation flaw.
    I also wanted to address some of the negative reviews I read on these overflow boxes. The material is not completely rigid but strong enough. I have only had my hands on the Medium size so this may be more of a problem with the larger sizes.
  • Great product worth the money By AJ on 6/25/2014

    I purchased the Small overflow for my build. It went on easy and looks great. Wishing i went a little bigger, but i'm excited for the way it will work compared to the HOB overflow i have been using.
  • Confused about prior reviews By Andrew on 5/30/2014

    Not exactly sure about the above reviews. If you will notice, they are all posted on the same day. I ordered this (RSS12) because everything else was out of stock and thought i would take a chance. I am more than happy. It is 3/8" thick black acrylic, not flimsy at all. Nice quality.