UP21 Sumpro Sump - Skimz

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UP21 Sumpro Sump - Skimz

100% Recommend this to a friend (3 of 3)

SKU: 210249
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Quick Overview

Sumps are a great addition to any fresh or saltwater tank. From adding additional water volume to area for heaters, reactors, probes, and any other life support equipment you may want to add. Many tanks are already drilled or can be drilled for a sump to be added.

Skimz Sumps are by far one of the best sumps for the money and packed with features all reefers will value.

  • Dimensions: 21” L x 18” W x 15” H

  • Skimmer Chamber: 11.5” x 13”

  • Return Chamber: 5” x 17”

  • Approximate Water Volume: 22 gallons

  • Skimmer Chamber Water Level: Adjustable from 7” – 9” with Level-O-Matic

We suggest choosing the largest sump that you can fit in the space allowed.


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Product Questions

Do you sell the 200 micron mesh socks to fit this sump. All I can find are the 300?
Question by: Joshua Graham on Jan 12, 2017 10:59:00 AM
Great question! Any of our BRS Mesh Filter socks will fit this sump. In which case, they are 200 micron! :-)
Answer by: Randy (Admin) on Jan 12, 2017 2:47:00 PM

Full Details

The features of the Skimz Sumpro series have been designed with the advanced reefer in mind, many of which you will normally only find on expensive, high end sumps. All Skimz sumps include integrated probe holders, filter socks, tube holders and an adjustable skimmer chamber. With a super clear front acrylic window allowing you see your equipment without any distortion and all other sides are white to keep things bright and super sharp looking.


DuoFlo Sock Chamber

With the importance of crystal clear water every Skimz sump comes with a DuoFlo tiered filter sock system. The system incorporates two filter socks of different lengths in a series allowing for fewer changes of both filter socks, and the ability to install a progressive micron system of filter socks.



Allows quick and steady adjustments of the water height in the skimmer chamber by controlling an adjustable baffle.  There are no thumb screws to mess around with like many of the competitors and your hands will stay dry when adjusting the baffle allowing your choice of skimmer to perform at its prime level.


Probe Holders

Each Skimz Sumpro Sump comes with 4 integrated probe holders that will accompany any type of probe up to ½” diameter.


Dosing Tubes

Dosing tubes can always be a source of clutter and headache to keep looking clean and not a tangled mess. Every Skimz Sumpro sump comes with 4 dosing tubes letting you dose anything you want from trace element solutions, calcium reactor effluent, nitrate reactors, or anything else that uses standard 3/16” tubing.


What’s In the Box:
1x Sumpro UP21
1x Sock Cover
1x Level-O-Matic Control Knob and Nut
1x Spillway Gate
1x Spillway Sponge
1x Chiller Hose Cover
1x Heater Cover plate
1x El-S300 Filter Sock
1x EL-L300 Filter Sock
4x Silicone Dosing Tube
4x Dosing Tube Hose Barbs and Nuts
1x Switchable PVC Pipe Cover
4x Switchable Cover Thumbscrews
4x Probe Holder Thumbscrews

Skimz Sump Comparison Chart

Model Approx water volume Skimmer Chamber Skimmer Chamber Water Height Refugium Chamber Return Chamber Built in Top-off reservoir Overall Dimensions
UP14 15 Gal 8" x 13" Adjustable 7" - 9" N/A 5" x 17" N/A 14" L x 18" W x 15" H
UP18 19.5 Gal 12" x 13" Adjustable 7" - 9" N/A 5" x 17" N/A 18" L x 18" W x 15" H
UP21 22 Gal 11.5" x 13" Adjustable 7" - 9" N/A 5" x 17" 3.2 Gal 21" L x 18" W x 15" H
UP22 15.7 Gal 11.5" x 11" Adjustable 7" - 9" N/A 5" x 12" N/A 22" L x 12" W x 15" H
UP30 26.9 Gal 14" x 14" Adjustable 7" - 9" N/A 8" x 14" 2.0 Gal 30" L x 15" W x 15" H
UP34 30.4 Gal 13" x 14" Adjustable 7" - 9" 5" x 14" 8" x 14" 2.4 Gal 34" L x 15" W x 15" H
UP36 32.3 Gal 13" x 14" Adjustable 7" - 9" 6" x 14" 8" x 14" 2.7 Gal 36" L x 15" W x 15" H
UP39 34.9 Gal 14" x 14" Adjustable 7" - 9" 8" x 14" 8" x 14" 3.0 Gal 39" L x 15" W x 15" H


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3 Items

  • Great sump for the money By BlueZ on 4/27/2017

    This sump looks great, quality is very nice especially for the price point. It's easy to adjust your skimmers water level, which is a huge plus if you have a finicky skimmer like I do.

    My only complaints are that you have to use the skimz socks. Not ideal but they are nicer quality than the typical felt socks and look like they will last a long time. Secondly, if your like me and have a bean animal overflow or an overflow that requires constant siphon to be silent, the overflow tube needs a hole drilled in it. When I first plumbed it, it wouldn't "burp" out the air by itself as the drain tube goes straight down below the water line. Drilling a few small holes in the grey pipe alleviated this issue.

    I would definitely buy another, very happy with these!
  • Just about perfect. By Chad on 2/17/2017

    Is just about perfect. The covers on the return pipe and filter sock section help muffle any noise and keep salt creep down. Also helps a lot with evaporation. I love that it has a built in top off chamber. Just watch as it has an overflow hole so make sure you watch while you fill as it empties into the skimmer section. It is extremely well built and arrives packaged to survive anything but your UPS person will learn to hate you. The adjustable gate works great as does the bubble trap. Return section could use to be a little bigger so make sure you know what is/needs to go into it.
  • Good sump that missed the mark. By Graham on 1/25/2017

    First off the shipping and packaging were great. The sump is well built and is larger than I thought. It's nice having the top off Reservoir in the sump. Having a top over the fill compartment has cut down my evaporation. There is also plenty of room for large skimmers. This sump does have some flaws. The sock holders are not standard 4 inch, they are smaller than all of the socks I have. Even the 4 inch BRS mesh sock do not fit. [ I tried]... Then there's the probe holders, they are located in the skimmer section. If your skimmer produces ANY micro bubbles they will fill the bottom of the probes. For TEMP & PH, this might be ok, but I had to move my salinity probe to the return pump section. Over all I am pleased with the sump it just needs some improvements.