Reef Octopus Classic 110INT 4” Internal Protein Skimmer

Reef Octopus Classic 110INT 4” Internal Protein Skimmer
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  • Reef Octopus Classic 110INT 4” Internal Protein Skimmer
  • Reef Octopus Classic 110INT 4” Internal Protein Skimmer Pump
  • Reef Octopus Classic 110INT 4” Internal Protein Skimmer Collection Chamber
  • Reef Octopus Classic 110INT 4” Internal Protein Skimmer Bubble Plate
  • Reef Octopus Classic 110INT 4” Internal Protein Skimmer Silenser
  • Reef Octopus Classic 110INT 4” Internal Protein Skimmer Lower Unit
  • Reef Octopus Classic 110INT 4” Internal Protein Skimmer Valve

Reef Octopus Classic 110INT 4” Internal Protein Skimmer

94% Recommend this to a friend (79 of 84)

SKU: 204061
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Quick Overview

  • Manufacturer Rated for tanks up to 100 gallons

  • BRS recommended for tanks up to 75 gallons

In sump skimmer. Powered by Aquatrance 1000 pump with an improved venturi design and pinwheel impeller. Built with high quality acrylic. Gate valve allows for more precise control of water level. 1/2" clearance required to remove collection cup for easy cleaning.


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Product Questions

What size compartment in my sump/refugium is needed for this? I plan on having it sit in the 1st stage were the water input is, and the output from this would be going into the refugium (2nd stage) of the sump/fuge
Question by: Ryan on Jan 30, 2014 5:19:00 PM
Hi Ryan,
The footprint of the skimmer is about 11x7 so you will want to make sure that you have atleast that much space for it.
Answer by: Bulk Reef Supply on Jan 30, 2014 5:19:00 PM
Hi guys. Sorry if this is in a previously asked question, but the "view all questions" link is broken. I just installed my new Reef Octopus NWB110 and I'm not sure how to set the gate valve. The manufacturers instructions were kind of unclear about that. I initially set it so that the foam reaches the very top before it falls into the collection cup. Is that correct? What is the ideal way to set the gate valve? Thanks for the help.
Question by: Benji on Aug 28, 2014 1:19:00 PM
Hi Benji,

I apologize for the broken "Questions" feature, I'll have our web team look into it if they are not already aware of the issue.

For the initial water level setting I would set it at the wavy line on the skimmer body and adjust from there as the skimmer breaks in and you can determine how the skimmer behaves in your particular set up. If you are not getting any skimmate in the cup after 24 hours you can slowly raise the water level in the skimmer until you do at which point you can make fine adjustments to get the desired amount of water/skimmate in the cup. Some people like to skim "wet" (lighter colored liquid) while others like to skim dry (darker colored liquid).

I hope this helps!
Have a great day :)
Answer by: Bulk Reef Supply on Aug 28, 2014 1:19:00 PM

Full Details

Reef Octopus Classic 110INT Manufacturer's Manual

  • Reef Octopus 4" Classic INT Skimmer CLSC-110INT
  • Dimensions: 10.6" x 6.75" x 19.75"
  • Manufacturer rates skimmer for tanks up to 100 gallons
  • BRS Recommends this skimmer for tanks up to 75 gallons
  • Powered by Aquatrance 1000 pump
  • High performance venturi air injection system
  • Modified cone neck design designed for easy transition of micro bubbles into cup
  • Precision controlled gate valve
  • In sump only
  • 1 year warranty on skimmer and pump
  • Metric plumbing parts.


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  • great product, good construction By Mitch on 6/16/2015

    For me being a newbie i really like this skimmer it was very easy for me to tune it and its very quiet
  • Pretty darn good skimmer for the price By Andrew on 5/18/2015

    Been going strong for close to three years on my 75g tank. Pulls out some nasty gunk. A little finicky when dialing it in, but it does a great job at this price point. I think if I were to upgrade, I'd need to spend a significant amount to get a better result, so this is a very good value.
  • Stay away from Reef Octopus By California Mixed Reef on 4/9/2015

    Buy any other skimmer on BRS except Reef Octopus. If any issues they are not allowed by Coralvue to return the skimmer or refund your money. I have been going back and forth with their customer service after purchasing elsewhere and they keep giving me the run around. While the BBB rates BRS an A+, Coralvue (the company that makes Reef Octopus) is not accredited and has a rating of D. Before sending replacement parts or refunding they will want you to perform test on faulty equipment and send them video of the malfunction. I have filed a complaint on Coralvue (reef octopus) with the BBB. Keep away from any Reef Octopus item customer service is a nightmare.
  • Skimmer tips over easy and is finincky. By oseymour on 3/15/2015

    The skimmer is well built but I had a couple of issues. The pump that is hanging on the side makes the skimmer tip over easily, every time I had to empty the collection cup, the skimmer would tip over. It also has a large footprint with the pump and exit pipe. It also takes a while to get dialed in
  • Solid Skimmer By Sean on 2/16/2015

    Very sturdy and stable, small footprint is perfect for my sump.
  • quiet By j roush on 12/16/2014

    this skimmer is super quiet and started skimming immediatly
  • Good but. . . By Ryan on 11/25/2014

    This is a great skimmer but in the first year I've already had to replace an impeller because it broke in half. other than that its a great skimmer and the smell of the liquid coming out is like sewage so that's nice.
  • Perfect fit By Johnny Sea on 10/25/2014

    I have a small sump and had very limited space. This skimmer works very well and easy to adjust.
  • Great skimmer for a good price. By Camellia on 10/9/2014

    I've been using this skimmer for over a year and have had it on two builds. Currently it's on a 75 gallon with 20 gallon sump and still working like a champ.
    I was a newbie when I bought this, it was my first skimmer and I had little problems getting it dialed in and skimming nice.
    It needs a good vinegar bath every 6 months or so for best performance.
  • Great Skimmer By Jordo on 9/25/2014

    This is an excellent entry level skimmer. I purchased this for my new 75G build. I have a total water volume of 90ish gallons and this skimmer keeps up great. Started to produce good dark gunk after 3 or 4 days of breaking in. 1st week it was really dark the started to lighten up so I know it outperforms at my level of bioload. Excellent performance for its price point. I would recommend!
  • Works By Skrappy on 8/31/2014

    Works well, easy to install.
  • Good Skimmer By DE on 8/25/2014

    This is a good skimmer and I like how it works, but I have to say that in the beginning I had problem adjusting the foam level in it and I did a modification to it that worked well. Basically, I added two control valves on the skimmers air intake; this way I precisely managed and controlled the level of foam. That being said, I think the manufacturer should have done this in the first place. Anyway, it works great now. Anyone, who has the same problem email me and I will send you instructions on how to do it.

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