Reef Octopus Classic 150INT 6” Internal Protein Skimmer

Reef Octopus Classic 150INT 6” Internal Protein Skimmer
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  • Reef Octopus Classic 150INT 6” Internal Protein Skimmer
  • Reef Octopus Classic 150INT 6” Internal Protein Skimmer Collection Cup
  • Reef Octopus Classic 150INT 6” Internal Protein Skimmer Pump
  • Reef Octopus Classic 150INT 6” Internal Protein Skimmer Bubble Plate
  • Reef Octopus Classic 150INT 6” Internal Protein Skimmer Chamber
  • Reef Octopus Classic 150INT 6” Internal Protein Skimmer Chamber Close Up

Reef Octopus Classic 150INT 6” Internal Protein Skimmer

96% Recommend this to a friend (99 of 103)

SKU: 204062
In Stock: 38
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Quick Overview

  • Manufacturer rated for tanks up to 150 gallons

  • BRS recommended for tanks up to 120 gallons

In sump skimmer. Powered by Aquatrance 2000 pump with an improved venturi design and pinwheel impeller. Built with high quality acrylic. Gate valve allows for more precise control of water level. ½” clearance required to remove collection cup for easy cleaning.


Full Details

Reef Octopus Classic 150 Manufacturer's Manual


  • Reef Octopus 6" Classic 150INT Skimmer CLSC-150INT
  • Dimensions: 12" x 8.5" x 22.13"
  • Manufacturer rates skimmer for tanks up to 150 gallons.
  • BRS Recommends this skimmer for tanks up to 120 gallons Powered by 1 Aquatrance 2000 pump at 198 GPH
  • 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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  • Awesome product By Spamguts2000 on 8/27/2017

    We have used this skimmer well over a year now and we absolutely love it. We have a 75 gallon reef tank with a 40 gallon sump
  • It's a beast. Performance and size. By skipper on 7/9/2017

    It's been great so far. Started getting skim mate day 1, but had to adjust a little bit in the first couple days and then a major adjustment about 2-3 weeks later. I've been running mine about 4 months now and would absolutely buy this product again.

    It is a bit big, but that's the best way to get big performance.
  • Simply the Best!! By uire on 6/21/2017

    Switched from 25 years of raising African cichlids to reefing a couple of years ago. This product came highly recommended from a guy that worked at a LFS. True, it does require a week or two to break-in but I've never experienced an issue and it does a great job keeping my 140g reef system crystal clear!
  • Great Skimmer By Bill on 2/8/2017

    I have had this skimmer for 2 years and I must say its a beast. Its on a 125 gallon with 40 gallon sump. I have a decent amount of fish and corals. I skim wet and have nothing but good things to say about the Reef Octopus Classic 150.
  • Great skimmer By Nicholas on 12/8/2016

    I have been running the 150 INT for 1 year now so I thought I would give my input. I run a 75 gallon display with a 20 long sump.

    The skimmer was a little wonky for the first week. It overflowed twice back into the sump. After a little trial and error I got it dialed in just right. Since the first week I haven't adjusted the valve. I empty mine once a month, not because it's full but because the tube gets grimy after the neck tapers to fit into the collection cup. I use a baby bottle cleaner to clean the cup.

    One improvement I would like to have would be an easier to clean skimmer body. There is a grate with tiny holes built into the bottom of the skimmer. The underneath section is borderline impossible to clean without the use of chemical. I just leave mine dirty as it really is more of an visual problem. My guess is including a removable bottom would be cost prohibitive. I purchased this skimmer for the price/quality ratio I could afford.

    I have about 70lbs of pukani, 40lbs of sand.
    1 chromas
    1 clown goby
    1 Cardinal
    1 pajama Cardinal
    1 lawnmower blenny
    1 fire fish
    1 Royal grama
    5 sexy shrimp
    1 peppermint shrimp
  • Great skimmer By David on 12/7/2016

    Great skimmer for the price. I run it on a 90 gallon reef with a 20 gallon sump. Would buy again.

    The only issue I have is that since I started using bio pellets the dry foam skimmer mate is crazy and over flows a little out of the collection cup but not back into the sump. Did not have this problem prior to using bio pellets.
  • A good value By Dan on 9/9/2016

    I've had this skimmer running now for 7 months and am happy with it. It took a while to figure it out as I was new to reef tanks but once I did it does a good job. The instructions are non existent on how to properly set it up. I want to get a float switch for it to shut it off so it doesn't overflow as it does go hay wire sometimes.
  • Good skimmer, pay attention to instructions By Martin on 7/29/2016

    There is a youtube video out there by coralvue. Make sure to watch, and pay attention to the setup instructions. I'd never had an in-sump skimmer before, and this had a lot of good reviews so I rolled the dice. I did fight with it a while to get it broken in but now she's running and pulling good skim. I'd recommend breaking it in with vinegar prior to installing just to shorten the breakin time. That said it's a pretty awesome skimmer.
  • works great By Joshua on 6/12/2016

    got skim right after setup
  • Good skimmer By Mike on 6/10/2016

    Very good skimmer. It was pulling skimate within 2 hours of running.
  • Pretty good unit By Billy on 5/6/2016

    Easy to set up. Quiet and pretty powerful. Only issue is that I guess it takes weeks to "break in" new skimmers and it overfills and then sometimes never reaches the top but since I'm still in that breakin period I can't fault this unit. Someone said if you soak it in vinagerfirst you shorten the breakin period.
  • Good skimmer for the price By Klwheat on 4/22/2016

    It's bigger than I expected...but that's what I wanted. I have it in a 90 gallon mixed reef with 30 gallon sump that I feed decently. Took about a week to break in and get it dialed in, but it's skimming great now.


Ask a question

Product Questions

Would this fit in a 10" x 10" square space if turned diagonally?
Question by: Mike on Mar 29, 2016 12:54:00 PM
Great question!
Unfortunately the skimmer pump which is mounted to the outside would get in the way of the wall of the 10x 10 area. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 30, 2016 11:57:00 AM
What is recommended water depth for this skimmer?

Question by: Mke on Jan 26, 2016 8:11:00 PM
Great question!
The skimmer will need 7-9 inches of water. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Feb 3, 2016 5:04:00 PM
It says 22.13 " ,how much room do you need above that to remove and clean the collection cup?, also what is the actual space need I see it says 12 × 8.5 ? The only season I ask is cause I have that space is just might be a little tight?
Question by: Ryan maccallum on May 27, 2017 6:52:00 PM
The collection cup sits in the neck with a friction fit/o ring seal, so you'll just need a couple of inches above the skimmer to clear and lift the cup technically. For space concerns, I would recommend taking the footprint measurements and perhaps making a cardboard template to ensure it will work in your space. I would allow for at least an inch on each side to not only allow for space for the skimmer, but also to allow for proper flow to and around the skimmer intake and outflow areas.

Happy reefing!
Answer by: Zack (Admin) on Jun 5, 2017 3:09:00 PM
Would this skimmer fix in a trigger system ruby cube
Question by: Darrell Booker on Apr 26, 2016 12:26:00 PM
Great question!
This would be a tight fit and with the pump not work, or make noise on the wall. Ideally the Classic 150SSS would be the best fit.
Answer by: Connor (Admin) on Apr 26, 2016 2:31:00 PM
Do you carry replacement shafts for the impeller (on water pump) on this skimmer?
Question by: Matt on Apr 7, 2017 5:29:00 PM
Hey there,
I'm afraid we don't currently carry replacement parts for these skimmers. If you are in need of components for your skimmer, you can contact the manufacturer directly for assistance.

Have a great day!
Answer by: Zack (Admin) on Apr 21, 2017 9:15:00 AM
I cannot control the bubbles coming through the octo 150 protein skimmer so it always overflows. Suggestions?
Question by: Paul Eastman on Nov 25, 2016 7:20:00 PM
Great question! One of the first steps you can take, if your skimmer cup is constantly overflowing, is to raise the skimmer up out of the water within the sump. Many people do this by building an egg crate platform. :-)
Answer by: Randy (Admin) on Nov 26, 2016 9:17:00 AM
Hello, I was curious how tall of a space this skimmer would need to be in? I have about 27 inches to work with and I'm nervous that the space would possibly be too tight for me to take the cup out. Thank you so much!
Question by: Natasha Lutz on Apr 3, 2016 7:47:00 PM
Great question!
This skimmer has a height of 22.13" and will work fin in a 27" high sump area as you will only need a few inches to remove the cup. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Apr 6, 2016 6:02:00 PM
Will this skimmer fit in a trigger systems emerald 34 sump?
Question by: Zach on Nov 9, 2016 10:49:00 AM
Hey there, thanks for reaching out to us! It looks like the Skimmer Section for that sump is: 10″ x 14″ and the footprint of the skimmer is 12"L x 8.5"W x 22.13"H. With those dimensions, that skimmer will fit. :-)
Answer by: Randy (Admin) on Nov 9, 2016 1:03:00 PM
I am concerned about noise since our tank is in the living room where we watch TV. How would you rate the noise level of the 150INT 6”?
Question by: John on Dec 31, 2016 8:57:00 PM
Great question! As is inherent with most skimmers, there is going to be a noise from the air intake from the skimmer. On top of that AC pumps, like the one on the 150INT, will tend to operate on the "louder" side. This is typically in the form of a mechanical hum. :-)

Answer by: Randy (Admin) on Jan 4, 2017 3:09:00 PM
Would this skimmer fit in the Trigger Systems Ruby Sump 30? I have the 110 in there now but was think of upgrading to the 150.
Question by: Brian Smith on May 11, 2017 8:09:00 PM
Hey there,
The 150INT and Ruby 30 would be a great combo. You'll have a couple inches of clearance on either side in the skimmer chamber, so you should be just fine.

Happy reefing!
Answer by: Zack (Admin) on May 14, 2017 5:09:00 PM
Would this fit in Reefer 170 sump?
Question by: Tommy on Jan 10, 2017 4:33:00 PM
Great question! The skimmer chamber in that sump is 11.8”x9.8” and the foot print of this skimmer is 12" x 8.5". Unfortunately, it will not fit. :-(
Answer by: Randy (Admin) on Jan 11, 2017 11:28:00 AM
How much room is needed to remove the skimmate cup, exactly?

I have 24" of interior space in my stand. +0.5" for the bottom of the sump to bottom of interior of stand... Wondering if I need to drop down to the 4" vs the 6".

This is for a 75 gallon display with 20 (ish) gallon sump.

Question by: Emily on Jun 24, 2016 2:19:00 PM
Great question! We typically recommend allowing for 3"-4" for skimmer cup removal. :-)
Answer by: Randy (Admin) on Jun 29, 2016 5:51:00 PM
Will this fit in the center chamber on a trigger crystal 30 sump
Question by: josh on May 31, 2016 6:28:00 PM
Great question!
Unfortunately the skimmer will be 12" long and the sump at widest is 11". Feel free to let us know if you have any further questions.
Answer by: Connor (Admin) on Jun 2, 2016 2:50:00 PM