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AquaMaxx HOB-1.5 Hang-On-Back Protein Skimmer


Starting at $20/mo with . Learn more

Item #: UJ94629

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The NEW AquaMaxx HOB-1.5 is an upgraded and more-powerful version of AquaMaxx`s best-selling HOB-1. With an enlarged bubble diffusor and reaction chamber, the new HOB-1.5 is able to fully harness the power of the Shark 1.0 pump to maximize foam production and protein extraction. The custom conical bubble diffusors help minimize the turbulence inside the reaction chamber and help to direct water linearly up toward the collection cup. More waste than ever is pulled out of your aquarium and into the easy-to-remove collection cup.

AquaMaxx skimmers are computer-precision engineered and utilize the latest filtration technology to deliver the performance and value you are looking for in a protein skimmer.

AquaMaxx HOB-1.5 protein skimmers is easy to setup and maintain. Just move the collection cup up or down to adjust the foam level to wet or dry.

Maintenance is simple. A removable collection cup makes cleaning easy. Plus, every AquaMaxx protein skimmer includes a drain fitting for hobbyists who want to setup a separate reservoir for skimmate.

Water quality and consistency is crucial to the success of a marine aquarium. An AquaMaxx HOB Series I protein skimmer will help to ensure that success.

AquaMaxx protein skimmers were designed from the ground up with the hobbyist in mind. AquaMaxx HOB Series I protein skimmers have the pump placed inside the skimmer itself to save space, reduce noise and improve efficiency.

All AquaMaxx protein skimmers are computer designed. Each unit is precision-cut and made of polished cell-cast acrylic.

AquaMaxx HOB-1.5 Skimmers feature high-quality Italian-made Sicce pumps. Each Sicce pump motor block is then modified and fitted with proprietary AquaMaxx needle wheel impellers. With the precise modifications and upgrades, performance is boosted much beyond that of a stock pump. The upgraded AquaMaxx ‘Shark’ pump is capable of drawing in significantly more air and chops them up to the optimum bubble size for protein extraction. These pump and protein skimmer combinations deliver unprecedented performance and reliability. Accumulated protein and organics will be vigorously removed from your tank so you can focus less on maintenance and more on enjoying your piece of the reef.

  • Modified and upgraded Italian Sicce needle-wheel pump produces optimum bubble size for high-efficiency protein skimming
  • Efficient, durable and reliable
  • Simple to set up and operate
  • Cell-cast acrylic construction
  • Dimensions: L 7.5 x W 3.5 x H 17 Inch
  • Pump: AquaMaxx SHARK 1.0 (modified and upgraded Italian Sicce pump)
  • Pump power consumption: 11 Watts
  • Outlet size: 3/4 Inch
  • Minimum tank height 10-7/8"
  • Filtration Rating: up to 75 Gallons (light bioload) or 40 Gallons (heavy bioload)
  • Requires approximately 4" of clearance to remove collection cup.
  • Fits aquarium rims up to 3/4" thick.
All of our products are backed by a 60-day return policy although the skimmers will also carry a 1-year manufacturer warranty from AquaMaxx. Each skimmer will include detailed instructions and diagrams to help hobbyists get up and running immediately.


No sump, no space? No problem! These hang on back skimmers are the perfect solution for any aquarium. Proven and reliable, these hang on back skimmers continue to
impress with their high quality Italian made pumps. They are by far MD`s top sellers and for good reason, they skim well and are easy to clean.




Footprint (In.) 7.5" x 3.5" 17.25" x 3.94" 8.75" x 5.5"
Height (In.) 17" 14.18" 20"
Motor Shark 1.0* Shark 1.0* Shark 1.5*
Gallon Rating Light Bio-Load: Up to 75g Up to 60g Up to 175g
Medium Bio-Load: ~60g ~40g ~130g
Heavy Bio-Load: Up to 40g Up to 20g Up to 90g


Built small and tough as their full-size counterparts. Equipped with Italian made pumps, they skim the heck out of nano aquariums and are quiet. They`re definitely not
toy skimmers.



Footprint (In.) 2.76" x 4.15" 5.9" x 3.2"
Height (In.) 13.39" 14"
Motor Shark Nano* Shark 1.0*
Gallon Rating Light Bio-Load: Up to 30g Up to 65g
Medium Bio-Load: ~25g ~50g
Heavy Bio-Load: Up to 20g Up to 30g
*Denotes Modified Italian made Sicce Syncra pump

Manufacturer information

AquaMaxx is a Southern California-based aquarium supply company that entered the market in mid-2008 with a line of affordable metal halide bulbs. The brand quickly gained recognition as word spread about the high quality and low cost of their lamps. In 2009, AquaMaxx released a line of aquarium filter socks and, in early 2010, unveiled an assortment of high-performance protein skimmer accessories and upgrades.

4 Stars


Reviewed on
March 27, 2021

Yes, I would recommend this.

Fish Only

Pros: Works hard, great for smaller systems with just fish, compact and quiet

Cons: Can't dose anything without overflowing, can't change the amount of air fed.

This skimmer is great for a tank setup with fish only that doesn't use high output lighting. I have had cyano algae outbreaks and as soon as I start dosing the skimmer wants to push the cover on the collection cup off and overflows everywhere. Great for handling nutrients input from food and natural waste but don't recommended dosing.

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Reviewed on
March 23, 2021

Yes, I would recommend this.

My 2 cents

Pros: It works great

Cons: Tiny bubbles & clogged air intake if your dosing

Ive had the older style for 4 yrs. and its just ok. The one thing i do like about aquamax is that the pump is inside the box, this gives me a piece of mind that it won't leak unless the box is cracked. I set up the new aquamax next to the old one and the second day of skimming its outperforming my old aquamax. But all the tiny bubbles are a nuisance, the manufacturer knows that its a problem so they try to sell you a bubble stopper. My opinion that's BS it should come with the bubble stopper or try to stop it altogether. If your dosing do it lightly the air input on the pump will start to get clogged , the results will show up on the skimmers performance. The best way to clear it, is to take it apart, i tried to send hot water into the air tube but it doesn't work. Im going to click yes for recommending this but be be warned of the issues this comes with.

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Reviewed on
March 06, 2021

Yes, I would recommend this.

Good choice

Pros: Compact, works well,

Cons: Somewhat challenging to me to get it fit together as intended.

I wanted the ConeS but didn't leave enough room behind the already setup tank. I like this because the pump is enclosed. Once it's setup correctly and broken in, it works very well. It did overflow quickly and frequently in the beginning but it settled down after several cup drainings.. I have the airline pulling through a CO2 scrubber. Definitely get the version with the bubble trap or you will come back for it. IIt is not loud, but I turn it off if I listen to music because it is audible.

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Reviewed on
December 08, 2020

No, I would not recommend this.

not impressed

Pros: good pump

Cons: Major flaw

I just got into the saltwater hobby, and if I didn't really enjoy it so far I would quit without hesitation thanks to this lousy skimmer. I wish I did enough research before buying this piece of junk

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Reviewed on
November 29, 2020

No, I would not recommend this.

Motor is Garbage

Pros: Does its job

Cons: Motor is terrible

It works great at first. Like many of the reviews have said, the motor dies after a few months. Very disappointed.

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Reviewed on
November 23, 2020

Yes, I would recommend this.

Has issues.

Pros: Small foot print and good performance

Cons: Internal silencer is a bad design

The design of this unit has an issue when the internal silencer remains partially submerged. In doing so salt creep will build up and eventually will block the air line to the Venturi. When this happens the internal water level will rise and exit the intake tube cut out in the skimmer body. You will have a leak onto the floor. I added an external silencer to help reduce this issue. Other than that the compact design and performance is nice.

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Reviewed on
October 04, 2020

No, I would not recommend this.

What a let down only had it for a few months and the pump took a dive

Pros: Works good when it works

Cons: Not the best of pumps to many problems with them

I had this skimmer only a few months only to stop working I tried to get ahold of Aquamaxx to honor my warranty and no one has gotten back to me.

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Reviewed on
August 26, 2020

Yes, I would recommend this.

my favorite

Pros: works solid dependable

Cons: gets stuck every few months....cleaning is annoying

this is my favorite skimmer to own..it works so great...i have some that 5 years old

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Reviewed on
August 10, 2020

No, I would not recommend this.

A lot a micro-bubbles after 3 weeks...noise, splash

Pros: Sicce pump

Cons: All

based on so many favorable reviews, I bought this skimmer ... for my 25 lagoon ... after 3 weeks I still have my tank full of micro bubbles ... I have actually tried several aquamaxx skimmers, and I am not at all impressed. .. If I could I swear I would not have spent $ 220 on this piece of garbage ... it makes noise, micro bubbles, splashes and you have to constantly clean the outlet with ro / di water so that the salt does not accumulate ... a disappointment. .. no more aquamaxx for me

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Reviewed on
August 07, 2020

Yes, I would recommend this.

Best Protein Skimmer

Pros: Great foam immediately . Did not take long to break in

Cons: Micro bubbles but only lasted a week or so

I’ve had tons of protein skimmers in the past and this is by far my favorite. I am a little more then three weeks in with the AquaMaxx 1.5 and I’m already getting great skimming. It is a lot more quiet Then the others I’ve had. I really love how the motor is inside of the skimmer itself rather then sitting inside the tank. I have already recommended this product to friends in the hobby . Awesome Protein skimmer

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