Reef Octopus Classic 110SSS 5" Internal Space Saving Protein Skimmer

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Reef Octopus Classic 110SSS 5" Internal Space Saving Protein Skimmer

100% Recommend this to a friend (11 of 11)

SKU: 209587
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Quick Overview

The sleek and compact Reef Octopus Classic 110SSS in-sump protein skimmer supplies powerful filtration for aquarium systems up to 120 gallons where sump space may be limited.

  • Small Footprint - Big Performance

  • Reef Octopus Aquatrance 1000s Skimmer Pump

  • Removable Turbulence Reducing Bubble Plate

  • Disassembles for Cleaning

  • Quiet and Energy Efficient Operation

  • Latest Output Design for Quiet Bubble-free Outflow

  • Solid Acrylic Construction

  • Body Size: 5in  

  • Footprint: 6.1in x 7.87in

  • Total Height: 19.7in

  • Output Size: 1.25in

Recommended sump water height: 7"-8"

BRS Recommended Tank Size:

Light Stocked - 90 Gallons

Medium Stocked - 65 Gallons

Heavily Stocked - 40 Gallons



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Product Questions

How much room is needed to remove the collection cup for cleaning? I have 21 inches of room under my stand
Question by: Dooley on Jan 4, 2017 6:09:00 PM
Great question! You will need to account for 2"-2.5" for skimmer cup removal. :-)
Answer by: Randy (Admin) on Jan 11, 2017 11:55:00 AM
I wan to run his on my 40 breeder set up is this a solid option for a mixed reef with a heavy Bioload ? Also what's he return policy? I've read a few comments saying reef octopus/ coralvue skimmers can't be returned
Question by: Jamaal on Feb 9, 2016 2:09:00 PM
Great question!
The 110 is a great option and will handle a very heavy bioload on a 40 gallon. Our return policy is new and unopened boxes. If the items have been opened unfortunately all warranty and support will be through Coralvue directly. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Feb 9, 2016 5:54:00 PM
Are the reef octopus skimmers ozone safe?
Question by: Robert on Apr 17, 2016 6:40:00 PM
Reef Octopus skimmers are made of 100% ozone-safe materials.
To avoid injury, you should research and take every precaution to properly inject and vent Ozone.
Answer by: Connor (Admin) on Apr 25, 2016 6:21:00 PM
What flow rate through the sump is best for this skimmer? I'm planning on a 600gph MAX return/overflow rate. Heard it's best to match all of these up
Question by: Joseph Collom on Mar 25, 2016 7:09:00 AM
Great question!
For skimmers it is typically recommended for 10x your system volume. As low as 5x can still work will and will give slightly more contact time for any elements. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 28, 2016 10:40:00 AM
My questing regards assembly. My tank is running and I want to add a protein skimmer. My sump is in the cabinet with limited space to maneuver a tall skimmer into the sump. How much assembly is required for the Reef Octopus Classic 110SSS 5" Internal Space Saving Protein Skimmer, and is it possible to install piece by piece?
Question by: Nathan on May 18, 2016 3:25:00 PM
Great question!
The skimmer is pre built from the body down, only the stand pipe and the collection cup. Feel free to let us know if you have any further questions.
Answer by: Connor (Admin) on May 18, 2016 3:29:00 PM

Full Details

Owners Manual


Recommended sump water height: 7"-8" 


BRS Recommended Tank Size:

Light Stocked - 120 Gallons

Medium Stocked - 75 Gallons

Heavily Stocked - 40 Gallons


The Reef Octopus Classic 110SSS is constructed of high-quality acrylic that can be completely disassembled for cleaning. Equipped with the new Aquatrance pinwheel pump, it produces an ideal mix of water and air for optimum waste removal. A simple vented wedge valve output provides precision control and allows cleaned water to exit the skimmer below water for quiet operation. Also available in the Larger Classic 150SSS model.

Internal model designed for in-sump use only. No feed pump required, skimmer draws water directly from sump.


  • 2 year warranty on pump
  • 1 year on rotor
  • 1 year on skimmer body



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11 Items

  • Reef Octopus 110 By WayneN on 3/29/2017

    Excellent skimmer, extremely quiet and very compact.
  • impressed By it just works on 3/11/2017

    This skimmer isn't finicky or fancy, it doesn't have a special break in procedure. It just works well and very fast. Noise level is average and cannot be heard unless you open your cabinet and get close to it. I have zero complaints and will use Reef Octopus more often.
  • Nice skimmer By gary on 2/7/2017

    This thing is dead quiet and works very well. I'm very happy with it. It's a little hard to put together with the provided instuctions. And the air line does not connect to anything, it just sits in the tube.
  • Fantastic skimmer! By Marc on 12/2/2016

    This skimmer is essentially dead quiet and puts out great skimmate. I wanted to replace my Seaside CS5.5 because it frequently vibrated sporadically. The build quality is excellent too.
  • Great skimmer By Luis on 7/11/2016

    Skimmer is pulling some good skimmate but I feel that I could be dialing it in better but haven't hit that sweet spot just yet
  • settings By slone64 on 7/10/2016

    i wish it was better explained about getting it dialed in for the amount of bubbles and the pushing up through the tube. seems to work best at the deeper end of 8". working well otherwise.
  • Awesome skimmer, especially for the price! By DeepBlue45 on 6/30/2016

    Couldn't be happier with this skimmer. I was concerned because I changed my sump design so was going from a more expensive external recirculating skimmer to this in-sump model. Basically I had it assembled and in the sump in about 15 min and it was pulling out dark thick skimmate with minimal adjustments required. It's also dead quiet. Maybe I got lucky and it works well with my set-up but very impressed.
  • New Set up By Btonben on 2/18/2016

    Installed this skimmer on my 110 gallon soon to be reef tank. It's pulling out a lot of junk. Well worth the price.
  • Wish I had this years ago By Dmolavi on 1/18/2016

    TLDR: If you're up in the air for a compact, high performance skimmer, look no further. BUY THIS ONE!!!

    Granted, my upgraded tank is only a couple months old, but after the first day it was pulling lots of gunk from the tank. It has a nice compact footprint, and is absolutely, dead silent. I had to open the cabinet a few times the first day I had it to make sure it was still running. The instructions are kinda lousy, but if you google, you'll find a good video on YouTube that shows how to put it together. It took about 10 minutes, tops.

    With the one I got, the silencer had two small tubes on it, instead of one large one. You don't have to cover these tubes, and the manufacturer recommends you don't in a post on their forum.
  • Love this skimmer! By Jack Sparrow on 1/12/2016

    The last skimmer I had was a Coralife 125 and I hated it with a passion! This skimmer works a billion times better without the hassle of a cheap product. The instructions are very confusing. They are not clear at all and honestly the parts didn't fit together tightly so I thought I was doing something wrong. it's ridiculously simple setup actually so I thought I was messing up. Overall I highly recommend this product!!
  • Great water quality...but lousy instructions By Davefla99 on 12/19/2015

    As a relative newcomer to the hobby, I opted to invest in a protein skimmer due to my high phosphates and nitrates. This brand/model was recommended by my local saltwater store, and has proven immediate results. The only issue I had was the instructions. I wish they were more clear w/ the actual setup and installation...and tuning and maintenance. I have had to find all this info via the web or again my local store.