Tunze Comline DOC Skimmer 9012

Tunze Comline DOC Skimmer 9012 – Quiet Power, Big Results in a Compact Body

The Tunze Comline DOC Skimmer 9012 provides you with reliable, efficient, and quiet protein skimming in your saltwater tank. Ideal tank size ranges from 79 to 264 gallons. It is a workhorse with no fuss involved—making it ideal for hobbyists who want reliable and strong performance without excess noise or hassle.

Think of it as the "silent assassin" of protein skimmers: sneaky quiet, but deadly to organic waste.

Tunze Comline DOC Skimmer 9012 Features Clean, Powerful Skimming

This skimmer doesn’t take up much space, but it packs a serious punch.

• Rated for mixed reef tanks up to 264 gallons

• Ideal for SPS-dominant setups up to 132 gallons

• Skimmer cup holds 0.18 gallons (yes, you read that right)

• Processes 105 gallons of air per hour

• Runs quietly at just 13 watts

• Magnetic holder attaches to glass up to ⅔ inch thick

• Includes Tunze Foamer 9012.040 for reliable bubble generation

Tunze Comline DOC Skimmer 9012 Offers Flexible Placement

With an immersion depth of 10 to 11 inches, the 9012 fits most sumps and back chambers of AIO tanks. It’s designed for internal use and features:

• Surface skimming with film removal

• Anti-overfoaming chamber for stable performance

• Silicone buffers to minimize vibration and noise

• Easy-access skimmer cup and foam reactor

• Bubble-free water return

Whether you're setting up a coral farm or upgrading your mixed reef, this unit makes it easy.

Tunze Comline DOC Skimmer 9012 Uses the Flash Skimming Principle

Flash skimming might sound like something out of a sci-fi movie, but it’s what makes this model efficient.

Fine air bubbles instantly trap proteins, dead cells, and other gunk at the surface. The contact time is short, but intense—like a double espresso shot for your filtration.

And the patented intermediate chamber prevents annoying overflows, even if your nutrients suddenly spike. That’s skimming with brains.

Tunze Comline DOC Skimmer 9012 Works Best Based on Aquarium Sensitivity

Here’s a quick cheat sheet on how to size your skimmer depending on your tank’s bioload:

• Low sensitivity (softies, leather corals): Full 264 gallons

• Mixed reef (LPS, softies, light fish): Up to 158 gallons

• SPS dominant tanks (high purity needs): Up to 106 gallons

• SPS with heavy fish load: Around 79 gallons

• Plankton or breeding tanks: Reduce capacity to 95 gallons

Tunze Comline DOC Skimmer 9012 Technical Specs (U.S. Units Only)

• Tank size recommendation: 79 to 264 gallons

• Immersion depth: 10 to 11 inches

• Air intake: 105 gallons per hour

• Energy usage: 13 watts

• Dimensions (L x W x H): 5.5 x 4.3 x 16.3 inches

• Skimmer cup volume: 0.18 gallons

• Glass thickness support: Up to ⅔ inch with magnet holder

Why the Tunze Comline DOC Skimmer 9012 Stands Out

If you're looking to keep your reef crystal clear without turning your tank into a tech jungle, this is it. Simple to install, low on energy use, and whisper-quiet—it’s a reefkeeper’s dream.

And hey, less time fiddling with gear means more time staring at your clownfish doing backflips.

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