Reef Octopus

Classic 150INT 6” Internal Protein Skimmer

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  • 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.


  • 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.


pdfReef Octopus Classic 150 Manufacturer's Manual

More Information
UPC 6950291202871
Skimmer Type In-Sump / Internal
Capacity Manufacturer rated for tanks up to 150 gallons
BRS recommended for tanks up to 120 gallons
Dimensions 12"L x 8.5"W x 22.13"H
Diameter 6"
Rec. Water Level 6-8"
Air Draw 720 LPH
Flow Rate 198 GPH
Pump Model Aquatrance 2000
Pump Rotor Type Pinwheel
Variable Speed No
Power Type AC
Power Consumption 18W
Power Cord Length 6 Feet
Warranty 1 Year
Additional Notes ½” clearance required to remove collection cup for easy cleaning
Gallons Per Hour 100 - 300 GPH
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Product Questions

Can this be used on a 75 gallon tank?
Question by: Ben Gonia on Feb 28, 2023, 11:27 AM
We would recommend the smaller 110INT for a 75g system as this will be a bit too large and you may not get adequate skimmate.
Answer by: William Reed (BRS Staff) on Mar 23, 2023, 2:19 PM
Is this skimmer ozone safe?
Question by: Brian i on Jan 18, 2023, 8:40 PM
Hey Brian, thanks for the question! Here at BRS we recommend Ozone reactors instead of skimmers. That said the acrylic should be able to handle it, although, again, not recommended.
Answer by: James Johnson (BRS Staff) on Feb 9, 2023, 11:51 AM
what is the foot print/ exact size of the base? I am using a 20gal long for a sump and have 113/4 " wide inside the sump.
Question by: jamie pincombe on Jan 11, 2020, 9:37 PM
Dimensions: 12" x 8.5" x 22.13"
Answer by: Tyler Schafer on Jan 14, 2020, 10:24 AM
I have this skimmer and the top recently cracked on mine, do you know the size I would need for a new cup?
Question by: Duncan on Nov 19, 2017, 8:26 PM
You will want to look for a 150 lid for the 150 skimmers. We have lids, but they come with Neck Cleaners attached. If you are looking for a direct replacement try contacting Coralvue (US Distributor) and they should be able to help you out with locating whatever you need for your skimmer.
Answer by: Charlie on Nov 20, 2017, 1:12 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 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 on Jun 5, 2017, 3:09 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 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 on May 14, 2017, 5:09 PM
Do you carry replacement shafts for the impeller (on water pump) on this skimmer?
Question by: Matt on Apr 7, 2017, 5:29 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 on Apr 21, 2017, 9:15 AM
Would this fit in Reefer 170 sump?
Question by: Tommy on Jan 10, 2017, 4:33 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 on Jan 11, 2017, 11:28 AM
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 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 on Jan 4, 2017, 3:09 PM
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 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 on Nov 26, 2016, 9:17 AM
Will this skimmer fit in a trigger systems emerald 34 sump?
Question by: Zach on Nov 9, 2016, 10:49 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 on Nov 9, 2016, 1:03 PM
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 PM
Great question! We typically recommend allowing for 3"-4" for skimmer cup removal. :-)
Answer by: Randy on Jun 29, 2016, 5:51 PM
Will this fit in the center chamber on a trigger crystal 30 sump
Question by: josh on May 31, 2016, 6:28 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 on Jun 2, 2016, 2:50 PM
Would this skimmer fix in a trigger system ruby cube
Question by: Darrell Booker on Apr 26, 2016, 12:26 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 on Apr 26, 2016, 2:31 PM
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 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 on Apr 6, 2016, 6:02 PM
Would this fit in a 10" x 10" square space if turned diagonally?
Question by: Mike on Mar 29, 2016, 12:54 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 on Mar 30, 2016, 11:57 AM
What is recommended water depth for this skimmer?

Question by: Mke on Jan 26, 2016, 8:11 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 on Feb 3, 2016, 5:04 PM