Tunze DOC Skimmer 9430

Tunze DOC Internal Aquarium Protein Skimmer 9430 – Stable Foam, Cleaner Water

  The Tunze DOC Skimmer 9430 is gives you optimized skimming performance without taking up a lot of room. Tunze's signature engineering provides practicality and power if you are running a commercical display system or a standard home aquarium.  

Tunze DOC Skimmer 9430 Is Built for Real-World Reef Systems

This skimmer doesn't just look good on paper—it thrives in real reef tanks. The patented Anti-Overfoaming System reacts dynamically to changes in surface tension, ensuring your foam stays where it belongs: in the cup, not the sump.

Three-Stage Anti-Overfoaming System

• Stage A: Foam production increases and pulls bubbles into the cup.
• Stage B: Excess foam triggers an internal stop, preventing overflow.
• Stage C: Once conditions normalize, the skimmer resumes optimal performance automatically.

 

Key Features of the Tunze DOC Skimmer 9430

• Aquarium Size: Suitable for saltwater tanks up to 800 gallons
• Skimmer Dimensions: 13.8 x 11.8 x 19.3 inches
• Skimmer Cup Volume: 0.5 gallons
• Cup Dimensions: 8.46 x 8.58 inches (diameter x height)
• Immersion Depth: 3.9 to 7.8 inches deep
• Energy Consumption: 32 Watts at 115 Volts
• Water Flow Rate: Adjustable up to 660 gallon per hour (GPH)
• Air Flow Rate: Adjustable up to 476 GPH
• Power Supply: 100–240V, 50/60Hz universal input
• Cable Length: 10 feet (to Turbelle controller)
• Headroom Needed to Remove Cup: At least 2.8 inches

Skimmer Cup and Filtration Features

• Large skimmer cup includes the foam reactor and removes easily.
• Internal mixing cylinder stabilizes foam and ensures smooth water output.
• Removable post-filter chamber with 300-micron nylon mesh for mechanical filtration.
• Filter chamber can also hold activated carbon or phosphate media.

Adjusts to Different Biotope Sensitivities

Depending on your reef composition, the effective skimming capacity of the DOC 9430 will vary:

Biotope Adjustments:

• Low Sensitivity (Leather Corals, Anemones): Use full capacity
• Medium Sensitivity (Mixed LPS/Soft Coral): Reduce capacity by 40%
• High Sensitivity (SPS-Dominant Tanks): Reduce capacity by 60%
• High Sensitivity with Heavy Fish Load: Reduce capacity by 70%

These guidelines help fine-tune the skimmer’s effectiveness based on nutrient loads and oxygenation requirements.

Why Choose the Tunze DOC Skimmer?

This unit doesn’t just perform—it adapts, stabilizes, and simplifies your reef maintenance. It arrives ready to mount and includes cleaning accessories for easy setup. From quiet operation to energy savings and smart foam control, this skimmer brings a lot to the table in a cabinet-friendly footprint. If you’re running a reef system up to 800 gallons and want clean water without constant fiddling, the Tunze DOC Skimmer 9430 delivers exactly that—and then some.        

Useful Resources of Skimmers and Tunze Gear

     

• Explore Tunze gear from wave pumps to auto top-off systems
• Skimmers for every tank size
• Internal Protein Skimmers for stronger skimming power

     

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