Reef Octopus

Classic 152-S 6" Internal Protein Skimmer

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This Reef Octopus Classic Skimmer is constructed of high-quality cast acrylic that disassembles completely for cleaning. Its unique Super Cone "wine glass shape" body naturally stabilizes and concentrates the organic rich foam as it rises producing an enhanced foamation.

Fully equipped with a Reef Octopus Aquatrance 1800s pinwheel pump to produce the perfect mix of water and air for optimum waste removal.


Two(2) year on pump body

One(1) year on pump rotor

One(1) year on skimmer body


pdf Owners Manual


BRS Recommended Tank Size:

  • Light Stocked - 200 Gallons
  • Medium Stocked - 140 Gallons
  • Heavily Stocked - 90 Gallons 


The Reef Octopus Classic 152-S is an in-sump protein skimmer capable of providing powerful filtration for aquariums up to 150 gallons where sump space may be limited.

  • Refined Filtration at an Affordable Cost
  • Compact Footprint
  • Ultra-efficient Aquatrance 1800s Pump
  • In-Sump Application
  • Turbulence Reducing Super Cone Body
  • Solid Cast Acrylic Construction
  • Bubble Dispersant Plate
  • Precision Control / Bubble Free Output
  • Efficient & Quiet Operation
  • Disassembles for Easy Cleaning & Maintenance
  • Super Cone Body Size: 6 to 3.5in
  • Footprint: 10.4in x 8.1in
  • Neck Size: 3.2in
  • Total Height: 20.7in
  • Output Size: 40mm / 1.25in

Recommended Sump Water level: 5-8 inches

More Information
UPC 6950291251954
Skimmer Type In-Sump / Internal
Capacity Light Bioload - Up to 200 Gallons
Medium Bioload - Up to 140 Gallons
Heavy Bioload - Up to 90 Gallons
Dimensions 10.4"L x 8.1"W x 20.7"H
Diameter 5.9" Cup, 3.2" Neck, 6" tapered to 3.5" Body
Rec. Water Level 5" - 8"
Output Size 1.25" (1-1/4 in.)
Air Draw 511 LPH
Flow Rate 140 GPH
Pump Model Aquatrance 1800S
Pump Rotor Type Pinwheel
Variable Speed No
Power Type AC
Power Consumption 11 Watts
Power Cord Length 6 Feet
Warranty 2 Years (pump body), 1 Year (pump rotor), 1 Year (skimmer body)
Pump Included Yes
Gallons Per Hour 100 - 300 GPH
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Product Questions

Are the water depths described in details based on your tests? The directions say 7.9-8.7'' recommended, your page says 5-8''. I'm setting at 7.5 (just dosed bacteria, so not turning it on for a week) and wondering if I need to somehow shorten the riser I made for it while it was being shipped. Thanks guys!
Question by: Jacob Smith on Sep 12, 2020, 10:03 PM
Ours is based on our test, but a lot will come into play such as how much particulates are in your water. Keep it at 7.5" for now but you may need to make adjustments.
Answer by: Matt Lucero (BRS Staff) on Nov 5, 2021, 10:01 AM
It is this skimmer (classic 152-s) resistant to ozone since I want to install an ozone equipment... Thanks
Question by: Jorge aguilar on Feb 26, 2019, 7:57 PM
Hey there,
Thank you for reaching out with your question. I apologize for the delay in getting back to you.
Yes, all Reef Octopus skimmers are made of 100% ozone safe materials.
Let us know if you have any other questions!
Answer by: William Glenn on Mar 8, 2019, 2:44 PM
Will reef octopus classic 152 s 6" fit in crystal sump 30 trigger system. In skimmer section of sump area
Question by: Darin Schoen on Nov 27, 2017, 10:07 PM
Looking at the dimensions on the product pages, it does appear they will fit. It will be a tight fit on the long dimension of the skimmer, but you should have enough room.
Answer by: Charlie on Nov 28, 2017, 8:22 AM
Is there a difference between the 152 s and the 150 ins other than the pump being internal? Which would you recommend for a 120 gallon reef with a light/ medium bioload?
Question by: Brycen Rackham on May 29, 2017, 3:22 PM
The 150INT is meant going to feature a more traditional externally mounted pump setup, with a slightly larger footprint as a result. The 152-s is a space saving model with the pump mounted internally. This does sacrifice a little bit of performance to save space, and usually we'd recommend a skimmer with external pump as this is easier to maintain and also provides slightly improved internal flow dynamics.Both utilize an aquatrance pump and will likely perform similarly, so it may ultimately come down to your choice on the balance of features vs. size.

Have a great day!
Answer by: Zack on Jun 7, 2017, 1:18 PM
What is the difference between the 152 s and 150 sss? I can't decide for my 100 gallon reef..... Thanks in advance.
Question by: William Rhodes on May 6, 2017, 9:52 PM
Hey there,
The 150sss is meant to maximize space-savings for very tight sump areas, with a footprint under 10" on both sides ( 7.3" x 9.5"). While the 152-s is also a space saving model with the pump mounted internally, it is somewhat larger. The benefit is that the 152 has the traditional wine bottle style body, as well as other popular features such as a collection cup drain port, air silencer with ozone port, and precision adjustment gate valve. Both utilize an aquatrance pump and will likely perform similarly, so it may ultimately come down to your choice on the balance of features vs. size.

Hope this helps!
Answer by: Zack on May 10, 2017, 11:06 AM
Would this work with a mixed reef heavy bioload 125 gallon?
Question by: Brenden on Jun 8, 2016, 8:07 PM
This skimmer could work on a lighter bio-load 125. However with a heaver load we recommend a larger skimmer closer to 200 Gallon rated bio-load.
Answer by: Connor on Jun 9, 2016, 6:50 PM
Would this work on a 90 gallon mixed reef with a heavy bioload?
Question by: TJ on Apr 19, 2016, 6:57 PM
Great question!
This will work well with a 90 gallon tank. Feel free to let us know if you have any further questions!
Answer by: Connor on Apr 26, 2016, 12:49 PM