Comline DOC Skimmer 9012 - Tunze

Tunze 9012 Comline Skimmer
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  • Tunze 9012 Comline Skimmer
  • Tunze 9012 Comline Skimmer
  • Tunze 9012 Comline Skimmer
  • Tunze 9012 Comline Skimmer

Comline DOC Skimmer 9012 - Tunze

67% Recommend this to a friend (2 of 3)

SKU: 210059
In Stock: 5
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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.

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

Heavy Bioload - 50 gallons

Medium Bioload - 150 gallons

Light Bioload - 260 gallons

  • Skimmer Cup volume: .7 Liters

  • Air capacity: 400 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. 255mm to 285mm (10 to 11 in.)

  • Power consumption: 13W, 230V/50Hz (115V/60Hz)

  • Dimensions: L140 x W110 x H415mm (L5.5 x W4.3 x H16.3 in.)


Full Details

Owners Manual


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.


3 Items

  • BEAST of a skimmer By Fred on 3/27/2017

    If you don't have a sump this is hands down the best skimmer on the market. It's the only skimmer that actually "skims" the surface of the tank for source water. In my opinion this skimmer will outperform most in sump skimmers as all that nasty surface film gets mixed into the water once it hits the sump. The surface skimming of this skimmer ensures that the source water is full of everything you want to take out. I've been running this for about a year and its very set and forget. It consistently pulls out dark, thick and nasty skimmate. I've owned Bubble King, Deltec, Euroreef, ASM, Aqua C, Bubble Magus and this is right up there with the Bubble King in terms of reliability and performance.
  • Awesome skimmer By Demon-Speeedin on 3/5/2017

    Been using this for over a year, love it. Not sure why the other person had problems with his but mine does not leave air in the system and skims a ton of skimmate out of the tank.
  • Don't waste your money By Stuart on 2/10/2017

    I have been using this skimmer off and on for the last 2 years. It released a lot of air bubbles into the aquarium, but other than that I was satisfied with how it worked for the first year. The problems started after the first 12 months. First the impeller broke. They sent me a new foamer under the warranty, but it only worked for 2 months. They sent me a second foamer which did not work right out of the box. After that they just ignored my emails. With some modifications I have managed to keep it working, but this skimmer is not worth all the problems.


Ask a question

Product Questions

Will this skimmer fit in the skimmer slot of a red sea max c250?
Question by: jason weber on Apr 24, 2016 9:56:00 AM
Great question!
This skimmer will need an area at least L5.5 x W4.3 x H16.3 in. As long as you are able to check the measurements of the chamber for your tank this skimmer may be able to work well!
Answer by: Connor (Admin) on Apr 27, 2016 1:41:00 PM