AquaMaxx HOB-XC Hang-On-Back Protein Skimmer

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The AquaMaxx Hang on Back Series - XC (HOB-XC) protein skimmer is the larger brother of the popular AquaMaxx HOB-1. It features an incredibly responsive collection cup and an amazingly powerful submersible pump. It is rated up to 90 gallons in a design thin and light enough to be placed on a small to medium size saltwater aquarium.

The AquaMaxx HOB-XC protein skimmer removes organic waste from aquarium water. It creates a strong mix of small air bubbles and turbulent water movement to force protein, waste and other materials into a collection cup for easy removal.

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-XC protein skimmers are 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 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 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.

The pump is what many consider as the heart of a protein skimmer. The HOB-XC has a heart of a thoroughbred by utilizing an Italian Cobalt Aquatics skimmer pump. This high-quality pump is designed specifically for protein skimmer applications and is ultra quiet and reliable.

Heaters can be quite an eye sore in aquariums. The new HOB-XC comes with a dedicated heater column so you can hide your heater inside the protein skimmer. The constant flow of water through the skimmer also helps heat disperse throughout your aquarium resulting in a more stable temperature.

The AquaMaxx HOB-XC protein skimmer utilizes a superbly crafted Italian Cobalt Aquatics needlewheel pump to vigorously remove waste from your fish or reef tank. Cobalt Aquatic pumps are well-regarded for their efficiency to move air and water. Combining these dynamic pumps with AquaMaxx protein skimmers saves users considerable energy.


  • Dimension : L 10” x W 5” x H 15 Inch
  • Pump(included): Italian-Made Cobalt Aquatics Skimmer Pump
  • Pump power consumption: 21 Watts
  • Outlet size: 1/2 Inch
  • Minimum tank height: 11"
  • Minimum space behind tank: 3.6”
  • Filtration Rating: up to 90 Gallons (light bioload) or 50 Gallons (heavy bioload)
  • Requires approximately 4.75" 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.

Product Manuals & Documentation

AquaMaxx HOB-XC Hang-On-Back Protein Skimmer

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

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.



Experience Level: Beginner

The Skimmer is nice but...

The skimmer is nice, however the pumps suck. I have had 2 pumps in it, the first one quit after 2 months of use. Marinedepot replaced it and now this one shuts off randomly during use. Contacted support they said water is suppose to be on the inside of the unit and asked me to take it completely apart (i think this would void any warranty on the pump). I am now looking for a replacement pump once again. STAY AWAY from this product until the pumps are fixed.

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Nate from Walled Lake, MI UNITED STATES


Experience Level: Intermediate


I have been using this skimmer for a week in a half now. I was using a cpr bak pak skimmer perviously and it wasnt cutting it. I finally pulled the trigger on this skimmer and so glad I did. The cord is short and pump is a bit loud, but it just becomes background noise to me. It has pulled some nasty stuff that i could never achieve with my other skimmer. I love this product and Aquamaxx.

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Experience Level: Expert

The good and the bad

I have been using this product for four days. It appears to be doing an excellent job. I am quite happy having selected this product. However, when the product arrived no pump was included. I called Marine Depot and they set one out immediately. It arrived Friday evening at that time I noticed that an internal plastic plate was cracked completely across the plate. I was still able to install and use the protein skimmer. The following Tuesday I called Marine Depot to see if I could obtain a replacement for that piece. I was told I had to take a picture of the crack and email it to them. That would involve completely disassembling the protein skimmer and then relying on my poor computer skills to email a picture. I don't have a cell phone that takes pictures, in fact I don't even have a cell phone just to the home phone. (I'm an old fart that's not at all techie). I'm not going to bother doing that. I'll use the crack piece and if it breaks I'll glue it back together. My warning would be that in buying this product all the pieces may not be in the box and those present may be broken. Marine Depot's requirement to show them a picture of the crack may be reasonable and easy for most people, however, for me, a customer who received a defective product, it involves more trouble than it is worth. MARINE DEPOT REPLY: not a problem sir, we will take care of you.

2 out of 2 found this review helpful

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Experience Level: Beginner

First Impression

Just started to re-set up a salt tank after a 8-year lapse, and to give a try with a marine and reef tank. Decided to add a protein skimmer-the HOB-XC. The written directions are rather poor. Had to check the youtube version to set it up. The electrical cord is really too short. Will have to get a small extension. Would have been nice to give a parts breakdown in the manual, at least for the pump showing repair parts. Starting to add the water now, so will have to get back to tell how it functions.

1 out of 6 found this review helpful

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Experience Level: Expert

Good Skimmer

I put this skimmer on my JBJ45 Rimless SPS tank. The skimmer was louder than the rest of the tank, but not loud overall. Very well built, and made thick green skimmate in a couple hours. I could see my coral brighten up.

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Reefer gurl from MD


Experience Level: Intermediate

Awesome product!

I bought this after 2 attempts with the Octopus brand; both failed my expectations. The quality of this is very top notch. After 24 hours, I was pulling skim-mate crap out of my reef tank. Very easy to set up; quiet, powerful. I highly recommend this if you're gonna spend some jingle on a protein skimmer

1 out of 1 found this review helpful

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Experience Level: Intermediate

Noisier than I expected

Has been running on my 55 gallon for about 12hrs now.Pros: Very easy to assemble. Appears to work quickly.Cons: noisier than I expected. Power cord is not long enough.Everything I read about the aquamaxx skimmers is how quiet they were. I was disappointed when I started mine up. I also have a fluval 405 running on the tank. This skimmer is at least twice as loud. Minus one starThe power cord is just long enough to reach the plug that I have in a power strip on the bottom of my standard height stand. There is not enough extra length for a drip loop. Minus a star.

10 out of 11 found this review helpful

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Experience Level: Intermediate

Great skimmer!!!!

I have Anthias in my 180 gal tank and was worried about excess protiens from food not eaten. Not a problem with this skimmer. Does the job++++. Would highly recommend it for smaller tanks and as an add on to larger ones. Easy to use and looks good too.

17 out of 18 found this review helpful

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