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Eshopps Cube Nano Refugium Sump

Product code: 5506

Availability: In stock

Ships tomorrow if ordered in the next 15 hours and 41 minutes!

Regular Price: $239.99

Special Price: $202.99

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Frequently bought together

Eshopps The CUBE R-NANO Refugium Sump


  • Eshopps Channel Design (ECD)-Dual Water Channel
  • Quiet Operation
  • Micron bag


  • Item#: 29821
  • Dimensions: 14"x14"x16"
  • Tank usage: 10-35g
  • Skimmer Compartment: 7.5"x8.5"
  • Refugium Compartment: 5"x8.5"



Removable Drain/Return LidEshopps sumps are made out of quality components and let you add additional water volume while giving you more space for filtration and equipment placement. The design of the Refugium series of sumps is simply outstanding. From a drain and return chamber cover, individual flow paths, and ease of maintenance, Eshopps sumps are simply the best.

  • White and Clear Acrylic
  • Eshopps Channel Design
  • Quiet Operation
  • Filter Sock Included


Dual Water Channel Design

CUBE Nano sumps feature unique flow through the separate refugium and skimmer chamber. The main advantage is that your skimmer can now uptake undissolved organics while your refugium can absorb nutrients like ammonia, phosphorus, and other unwanted nutrients without having to compete with each other.


Water Flow

The Eshopps Cube sumps have a unique flow pattern through them. Water first drains into the main drain chamber where a portion of the water will flow into the refugium chamber, and skimmer chamber completely separate. The skimmer compartment has a filter sock to help polish the water of any debris or detritus before entering the protein skimmer, where the refugium compartment gets completely unfiltered water. Keeping the flow paths isolated greatly increases the protein skimmers efficiency and also the growth rate of the refugium. Both chambers drain into the return pump chamber where water can be pushed back into the aquarium by your choice of return pump. 


Model Dimensions

Skimmer Size

Filter Sock Refugium Size Return Size Recommended Tank Size
CUBE Nano 14" x 14" x 16" 7.5" x 8.5" 4" 5" x 8.5" 3.5" x 5.5" 10 - 35 Gallons
CUBE Medium 18" x 18" x 16" 11.5" x 8.5"  Rectangle 11.5" x 7.5" 7.5" x 5" 35 - 75 Gallons
R-100 24" x 12" x 16" 11.5" x 8" 4" 10" x 7" 4" x 11.5" 75 - 125 Gallons
R-200 30" x 14" x 16" 11.5" x 13.5" 7" 10" x 8.5" 5" x 13.5" 125 - 225 Gallons
R-300 36" x 16" x 16" 15.5" x 15.5" 7" 12" x 9.5" 6" x 15.5"  225 - 300 Gallons


What's Included?

  • 1x Cube Nano Refugium 
  • 1x 1" Bulkhead 
  • 1x 4" Micron Bag
  • 1x Refugium Foam
  • 1x Drain/Return Cover
  • 1x PVC Pipe
  • 1x 3' Flex Hose


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  1. Pretty good for the buck Review by Mike
    Product Rating:

    Well constructed, fits most appropriate skimmers(for the size, including other brands) and had no problem fitting a DC pump in there from another brand. Even have a roller connected, detached the sock. Good height for mangroves, rock, sand, etc. as well in the refugium. The only three issues you may have is the cover for the return and sock are the same. The hole leaving the sump is not quite large enough for standard 1” or .75” tubing, really the only reason I can’t give it a 5 star. Changing the height of the skimmer area is only made possible if buying other equipment from the store which could be solved with an adjustable acrylic shield if they could change those things in construction it is otherwise 100%. I would buy it again. (Posted on 11/21/2019)

  2. Great sump! Review by jeffmr4
    Product Rating:

    Great sump! (Posted on 2/8/2018)

  3. WELL-BUILT, QUALITY SUMP Review by Darek
    Product Rating:

    I bought this to use with my Biocube 29. Fits well under the cabinet, and made a big difference to the overall stability of the system. I had the same issue with the water not passing through the filter sock that was mentioned in another review. I added a plastic plate to my refugium to raise the water level slightly, causing more water to divert into the skimmer section. Eshopps would have done well to include a device to allow this adjustment, so that the device could be tweaked by the user in this fashion. Overall, I am very pleased with this purchase. (Posted on 12/15/2017)

  4. To small of pump area but it Great sump I return it Review by Chuck
    Product Rating:

    Could not find a go flow pump to fit its small pump area. They need to increases the area for the pump. Very small pump could fit there only. I return it and got the R100 form ESHOPPS. Would not buy thos one. (Posted on 12/5/2017)

  5. Great sump Review by Robert
    Product Rating:

    Great sump!!! For price (Posted on 11/24/2017)

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