Bullet-2 Hang-On-Back Protein Skimmer

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AquaMaxx Bullet-2 Hang-On-Back Protein Skimmer

AquaMaxx`s Bullet HOB Skimmer series was designed to deliver high performance in small spaces. Unlike traditional hang-on-back skimmers which can be a large eyesore for your aquarium, the Bullet`s innovative bubble diffuser design allows for powerful filtration in a smaller footprint. The Bullet-2 is the next step up in size from the original Bullet HOB nano skimmer, and is recommended for aquariums between 30 and 50 gallons.

  • Slim profile
  • Innovative bubble diffuser design
  • Ultra silent operation
  • Designed for small aquariums up to 50 gallons
  • High-performance Sicce SHARK needlewheel pump
  • Easy maintenance and cleaning
  • Simple to set up and operate
  • Compact footprint
  • Durable cell-cast acrylic construction

AquaMaxx protein skimmers were designed from the ground up with the hobbyist in mind. The AquaMaxx Bullet HOB protein skimmer features an advanced internal flow design to efficiently mix air and water, extracting the maximum amount of protein. Noise is minimized by the built-in air silencer and silicone noise dampeners, and the skimmer`s smooth, bullet-shaped body and transparent chamber allow for easy cleaning and maintenance. High-quality cell-cast acrylic is used throughout the build for maximum durability, precisely assembled by experienced craftsmen to produce a top-notch product at a very affordable price.

The Bullet HOB features a high-performance SHARK pump: an enhanced Italian-made Sicce pump. Each Sicce pump motor block is modified and fitted with proprietary AquaMaxx needle wheel impellers, which boosts performance much beyond that of a stock pump. The upgraded AquaMaxx SHARK pump is capable of drawing in and chopping up significantly more air, providing the optimum bubble size for protein extraction. Accumulated protein and organics will be vigorously removed from your tank so that you can focus less on maintenance and more on enjoying your piece of the reef.



  • Footprint: 6.5" x 6.1"
  • Height: 18.3"
  • In Tank Dimesnions: 12.4"L x 3.5"W x 3.1"H
  • Pump: Sicce SHARK 0.5
  • Pump Power Consumption: 4.4 Watts
  • Minimum Tank Height: 10"
  • Filtration Rating: Up to 50 Gallons (light bioload) or 30 Gallons (heavy bioload)
  • Fits on Rims up to 3/4" Thick

*Requires Approx. 11" of clearance to remove collection cup

More Information
UPC 651137773253
Skimmer Type Hang On Back, Nano
Capacity Light Bioload - Up to 50 Gallons
Medium Bioload - Up to 40 Gallons
Heavy Bioload - Up to 30 Gallons
Dimensions 6.5"L x 6.1"W x 18.3"H
Max Tank Thickness 4/5 in.
Pump Model Aquamaxx SHARK 0.5 (modified & upgraded Sicce pump)
Pump Rotor Type Needlewheel
Variable Speed No
Power Type AC
Power Consumption 4.4 Watts
Additional Notes Requires Approx. 11" of clearance to remove collection cup & a minimum tank height of 10"
Pump Included Yes
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Product Questions

Will this work on a rimmed 40g breeder?
Question by: 4 Fox Sake on Feb 19, 2023, 1:05 AM
This skimmer can accommodate a rim up to .8" wide
Answer by: William Reed (BRS Staff) on Mar 23, 2023, 9:49 AM
I have a 40 gallon water box aio could I hang this on the back and use one of the back chambers
Question by: Mike on Jan 18, 2023, 11:22 PM
Hey Mike, thanks for the question! Yes you could!
Answer by: James Johnson (BRS Staff) on Feb 9, 2023, 12:32 PM
I have 3 inches of clearance from tank to wall. What’s the width of skimmer without the hang on portion that goes into tank?
Question by: David on Jan 14, 2023, 9:32 PM
Hey David,

Thanks for the question. The Skimmer will extend roughly 3.5" from the tank.
Answer by: James Johnson (BRS Staff) on Feb 8, 2023, 4:24 PM