Comline DOC Skimmer 9004 DC - Tunze

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  • Comline DOC Skimmer 9004 DC - Tunze

Comline DOC Skimmer 9004 DC - Tunze

71% Recommend this to a friend (5 of 7)

SKU: 210058
In Stock: 15
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What's This?

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Quick Overview

Why does BRS recommend this?

We have really liked the Tunze Comline skimmers due to their small form factor and their ability to adapt to many different systems. With AC pump and DC pump models available you can choose the skimmer that works best for your system.

Includes DC powered pump and controller for complete control.

Using the Tunze Flash Skimming Principle, the Comline DOC Skimmer pulls water through an efficient surface suction.

Heavy Bioload - 20 gallons

Medium Bioload - 40 gallons

Light Bioload - 60 gallons

  • Skimmer Cup volume: .2 Liters

  • Air capacity: 200 L/H (52 GPH)

  • Magnet holder for up to 1/2" thick glass

  • Quiet Operation

  • Bubble free outgoing water

  • Easy to remove collection cup

  • Immersion depth: approx. 225mm to 245mm (8.86 to 9.65 in.)

  • Power consumption: 5W, 230V/50Hz (115V/60Hz)

  • Dimensions: L110 x W90 x H305mm (L4.3 x W3.5 x H12 in.)


Full Details

Owners Manual


The 9004 DC Skimmer now includes a DC powered pump and controller for ultimate control and tuning ability.


The Tunze Comline DOC skimmer utilizes Tunze's "Flash Skimming" principle. The skimmer is quiet and generates a very large volume of small bubbles for efficient skimmer operation. It operates stand-alone without needing any additional equipment (feed pumps, etc) and mounts to the tank via a convenient magnet holder strong enough for glass up to 1/2" thick.


The TUNZE® Foamer generates large volumes of fine air bubbles with a diameter between .0039 to .011 in. (0.1 to 0.3 mm) On the surface of the air bubbles, pollutants such as protein, cellulose, dead cells, etc. are adsorbed immediately. The water/air mixture expands and stabilizes in the skimmer cup reactor, the water returns to the aquarium, and the protein-loaded air bubbles spill over into the skimmer cup. The patented anti-overfoaming system intermediate chamber prevents the skimmer from over foaming and controls the skimmer performance, depending on the water level and organic load. This “flash skimming” principle, compared to large skimmers with long contact time, is obtained because the substances adsorbed by the air bubbles are not released again, thus they don‘t return to the aquarium water.


7 Items

  • Awesome nano skimmer By Erik on 9/5/2017

    Once installed the skimmer instantly started producing skimate after a week worked even better. Very impressed and worth every penny to improve water quality.
  • Great for its price! By Alex on 5/21/2017

    This skimmer is great.It started producing skimmate in less than 30 minutes.This skimmer is awesome with the DC model. You might be thinking it so expensive, But this has cut my algae in half. It's very cool with the cup collection feature.The only downside is that tiny micro bubbles slip through the collection cup and the main unit but its very minimal. Hope this helps.
  • Awesome skimmer By Kyle on 1/6/2017

    So I have this skimmer in the Nuvo 40 and I absolutely love it I have it in the first chamber and it does restrict some flow but it worth it. It's been in tank for about 24 hours and already has some dark nasty skim mate in the cup. It's super quiet can't tell it's even on I hear my return pump over this skimmer. I picked up the one that you can control and I am glad I spent the extra money for it well worth it. Don't worry about this buy you will love it. Thanks BRS for carrying another awesome product .
  • Awesome By Lee on 12/19/2016

    Fantastic skimmer! I purchased this skimmer slightly oversized for my tank (29 gallon) primarily due to the adjustability for bioload and surface skimming capability as I don't have a sump. Could not be happier. Pulls out some nasty gunk. Don't worry if it is a little noisy initially, once it breaks in the skimmer is practically silent. Thanks BRS for carrying Tunze skimmers...
  • Great product with a compact design By Kenny on 10/23/2016

    Purchased this for my JBJ RL30 and live the sludge it's pulling from my tank. Very impressed with the dark skimmate from a nano sized skimmer. The DC motor allows for true adjustment to fit your bio load needs. Another great product from a trusted brand.
  • GREAT Bought another By darryl hey on 8/1/2016

    My second one, another great product from Tunze.
    works great and is easier to control the air for a nice DRY skim.
    Plus it can be hooked up with safety box to make it battery operated in a power outage.
  • Great! By Darryl on 7/21/2016

    another great product from Tunze.
    works great and is easier to control the air for a nice DRY skim
    plus it can be hooked up with safety box to make it battery operated in a power outage.


Ask a question

Product Questions

Will this skimmer fit in the second compartment of a jbj rl 45
Question by: Alex on Apr 16, 2017 9:40:00 AM
Hey there,
As we don't carry the JBJ rimless tanks, I'm afraid we can't make this test ourselves. However, in talking to our customers, they have found the Comline 9004 to fit in the back of the 45 rimless tanks.

Hope this helps!
Answer by: Zack (Admin) on Apr 26, 2017 2:49:00 PM
Will this fit a red sea c 130 tank in place of the stock skimmer
Question by: Steve on May 20, 2017 3:03:00 PM
Based on the listed dimensions for this system, I'm afraid it would appear that the 9004 is just a little too large to fit in the back.

Happy reefing!
Answer by: Zack (Admin) on May 22, 2017 6:41:00 PM
Will this fit in the back compartment of the Innovative Marine Fusion 20? The IM Ghost skimmer I have now I don't like
Question by: Daniel on Dec 31, 2016 9:23:00 AM
Great question! This will not fit for the Fusion 20. Currently, the IM Ghost skimmer is the only option we have available that will fit. :-)
Answer by: Admin (Admin) on Jan 9, 2017 9:32:00 PM