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Bubble Magus NAC3.5 Protein Skimmer


Item #: 4W03522

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The Bubble-Magus NAC3.5 Cone skimmer is practical and highly efficient. This skimmer offers innovative features at an affordable price: which makes it a great value.

NAC3.5 Features
  • cone skimmer body to allow smooth transition of skimmate to the collection cup
  • needle wheel pump with venturi intake that produces just the right amount and size of air bubbles
  • bubble plate to reduce the turbulence in the reaction chamber
  • collection cup drain to reduce maintenance frequency
  • compact footprint that allows easy installation
NAC3.5 Specifications
  • Tank Capability: 25G-80G
  • Pump: ROCK - SP1000
  • Pump power: 8W, 110V 60Hz
  • Max Chamber Diameter: 4"
  • Dimensions: 4.7"L x 7.08"W x 17.3"H
  • Water Level: 8"-10"

Manufacturer information

Bubble Magus was founded in 2006 and has been producing high-quality aquarium equipment for over a decade.

They take a practical approach to product development and focus on high-efficiency and affordablity, which makes them a popular choice among experienced reef aquarium hobbyists.

Here at Marine Depot, we carry the best Bubble Magus has to offer. Their Curve Series protein skimmers are highly sought-after for in-sump usage and their dependable dosing pumps are relied upon by thousands of reef hobbyists for the precise delivery of liquid foods and water chemistry supplementation.

5 Stars


Reviewed on
September 25, 2020

Yes, I would recommend this.

Great Skimmer! Great Price!

Pros: Size great and is very efficient.

Cons: none

excellent value, i replaced a 100$ SCE301 with this and it was so good i bought a second for my frag tank. Zero micro Bubbles and excellent quality.

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Reviewed on
April 30, 2020

Yes, I would recommend this.

Excellent Skimmer

Pros: Small footprint, pulls out lots of waste, once dialed in, doesn’t need adjustments.

Cons: Some noise but typical for a skimmer

Great skimmer - easy to setup and run. Once dialed in, doesn’t need to be adjusted. Consistently pulls the waste and easy to clean.

Was this review helpful? 1 0


Reviewed on
June 11, 2019

No, I would not recommend this.

The worst skimmer I ever owned

Pros: None

Cons: Where do I start

purchased mid March it is now almost mid june skimmer still overflows randomly out of control or just a very wet skim I have tryed skimmer at different water levels with no luck and just when you think you might finally have it fine tuned it overflows I am not new to this hobby have had manny skimmers this is by far the worst if I was able to I would send it back

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Reviewed on
April 01, 2019

Yes, I would recommend this.


Pros: Fine bubbles

Cons: Finnicky adjustment

Works great Good price Fast shipping

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Reviewed on
July 08, 2018

No, I would not recommend this.

Great skimmer

Pros: Quite skimmed well

Cons: He’d to maintain

I really like it but I hated cleaning it why couldn’t they make it like the rest of them

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Reviewed on
August 14, 2017

Yes, I would recommend this.

Great quality skimmer at a low price!

Pros: Clear construction, high quality materials used, runs very quiet.

Cons: at the suggested depth it overflowed, fixed by raising skimmer up.

This is actually the second skimmer I have bought, for a different tank than the other one. The first was this no name brand skimmer that just felt cheap right out of the box. It wasn't well designed and a plastic bracket broke on it. The bubble magus right out of the box it just feels like its made from high quality materials, the crystal clear body and collection cup make it easy to adjust the bubbles and to ensure that it is working properly. It started taking stuff out of the water within the first day of operation and I love that it has a drain already put into the collection cup. Very happy with this purchase and will be getting a second one for my other tank.

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aaron amos

Reviewed on
April 16, 2016

Yes, I would recommend this.

Protein skimmer

The skimmer is very well made. You will have to adjust it often. Runs very quiet. The only thing I had problems with. When I got the skimmer in I was missing parts. But customer service was very help full and got the parts out to me the next week.

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chris andrzejewski

Reviewed on
February 23, 2016

Yes, I would recommend this.


Awesome skimmer

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timothy walker

Reviewed on
March 27, 2015

Yes, I would recommend this.


very styling design I really like it

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Reviewed on
November 09, 2014

Yes, I would recommend this.


This is a great skimmer for those that have a tight area to place a skimmer. This thing is dead silent and broke in very fast! I would highly recommend this skimmer.

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