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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

95% Recommend this to a friend (77 of 81)

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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Previously Asked Questions

  • by Ryan on January 30, 2014, @5:19 PM

    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

    Bulk Reef Supply 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.

    Do you find this question helpful?  Yes   No

  • by Benji on August 28, 2014, @1:19 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.

    Bulk Reef Supply 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 :)

    Do you find this question helpful?  Yes   No

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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  • 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. st.jay55@gmail.com
  • Good Quality Skimmer for a Fair Price By Chris on 7/22/2014

    I ran this skimmer for about 7 months on about 85 gallons of system water with no problems and good results. Relatively quiet pump for the price. Pulled good skimate after about a week, but continually got even better once fully broken in and dialed in.
  • Value By q on 7/16/2014

    for the price, it works wonder. using this skimmer on a 75 gallon with no problem
  • Great skimmer value By John on 7/7/2014

    I have a 75 gallon mixed reef with a 29 gallon aquarium used for my sump, divided into three chambers. This skimmer fits nicely into my first chamber. After shopping around and reading the reviews I am glad I bought this one. I have had it for 18 months now and it is still working great.

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