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Home » Saltwater Aquarium Supplies  » Protein Skimmers  » In-Sump Skimmers  » Spray Injection  » Up to 150 Gallons  »  AquaC EV-120 Protein Skimmer with JG fitting
AquaC EV-120 Protein Skimmer with JG fitting

AquaC EV-120 Protein Skimmer with JG fitting

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AquaC EV-120 Protein Skimmer with JG fitting Information

Product Manuals & Documentation

The revolutionary AquaC protein skimmers do not use venturis, downdraft tubes, or air pumps; they employ the patented "Spray Injection System." This innovation allows the protein skimmer to efficiently draw in much more air than any other of the top protein skimmers. This coupled with the superiorly designed compact reaction chamber yields results that will literally blow the waste out of your water.

How does Spray Injection Work?

In 1998, Jason Kim (owner and founder of AquaC) developed a patented process of protein skimming which has come to be known as Spray Injection. Unlike previous forms of skimming, our spray injection method enables huge amounts of air and water to be processed with a relatively small pump. Although it is a simple process, there is still some confusion as to how the spray injector works.

Imagine that you`re washing your car – you`ve got a bucket full of soapy water and a garden hose with a fast-moving stream of water. By placing your thumb over the end of the hose, you can disrupt the stream into a turbulent, high –pressure spray. Now direct that spray down into the bucket of water, and you`ll generate a massive amount of bubbles and air flow. That is exactly how our spray injector works.

The skimmer body acts as a water reservoir – the bucket in the example above. Water is pumped through the spray injector, which has a special nozzle that fans the water out into a pressurized spray. This spray shoots into the skimmer body, generating millions of tiny air bubbles. As the bubbles are formed, more air is sucked into the skimmer as a result of the local drop in pressure and the process continues.

Most other forms of protein skimming rely on special valves or media to generate the air flow, and these parts quickly become clogged with salt, dust, or even mineral deposits. The AquaC spray injector is a relatively large nozzle that resists clogging, and when combined with a pump prefilter, can be considered maintenance free.

The redesigned and improved EV Series skimmers raise AquaC`s spray injection skimming (U.S. Patent # 6,156,209, #6,436,295) to a new level in terms of efficiency, performance, and value. A new baffling system combined with a significantly larger mixing box results in far less turbulence and increased contact time. The net effect is a dramatic increase in skimmer performance despite a drop in pump pressure requirements. AquaC`s molded spray injector now generates a significantly larger number of microbubbles, boosting overall performance to unbelievable levels considering such low pump pressure requirements.

  • Flexible design for in-sump or external applications.
  • The new EV Series skimmers are designed to run in sumps WITHOUT BEING RAISED. The output gate valve has been increased to a height of 10" (EV-120/180 models), which means that as long as your sump level is 9" or lower you will not need to worry about fluctuations having an impact on skimming consistency. The powerful EV-120 can sit in water as deep as 9".
  • The addition of a precision ball valve for airflow control allows the aquarist to fine tune the skimmer`s output. Unlike most other high performance skimmers in this class, the EV is remarkably silent. The spray injection system does not generate the sucking noises typical of venturi and Beckett units.
  • The John Guest "Speedfit" fitting is a great feature you will only find on AquaC ozone-equipped skimmers. This fitting is standard on models EV-240 and above, and can be ordered on the EV-120/180. Aquarists may also connect their calcium reactor effluent line to the skimmer`s speedfit connection. The pH of a calcium reactor effluent typically falls between 6.5-6.9, and over time the addition of this low pH effluent can have a deleterious effect on the system`s pH level. By dosing your effluent directly into the skimmer, excess CO2 will be "blown off" into the atmosphere and the tank pH will remain unaffected.
  • The improved "Twist-Lock" collection cup and cap makes for a secure, flanged connection without the need for set screws or other locking type unions. Simply twist to crack the seal (EPDM gaskets) and removal requires a scant ¼" clearance. The new EV Series skimmers can be operated with AquaC`s auto-waste container, which are available in 2.5 and 5 liter sizes.
  • Increased contact time = more protein removal. The size of the mixing box has been increased on all models by approximately 40%. To accommodate the extra foam the skimmers now feature taller and wider reaction towers, as well.
  • Height: 18"
  • Recommend Pumps: Mag Drive 5 or Rio 2100
  • Footprint: 4.75" x 8.5"
  • Foam Tower: 4" x 6" OD
  • Tank Size: 40-120 Gallons
  • JG Fitting: Optional 1/4" JG fitting
  • Bubble Size: .03–.05mm
  • Water flow-thru rate: 225gph
  • Volume of foam produced:
  • Input: 3/4" hose barb
  • Output: 1" gate valve
  • 5/8" collection cup drain
  • 3/8" threaded air inlet
  • Gate valve exit is 7" high
  • Auto-waste container compatible-flanges feature EPDM gaskets

AquaC EV 120/180 Protein Skimmer AquaC EV 240 Protein Skimmer
EV 120/180 Skimmer EV 240 Skimmer

AquaC EV Protein Skimmers Comparison
Description Tank Size
Pump Height Footprint Foam Tower Volume
EV120 40-120 Rio 2100 
Mag-Drive 5
18" 4.75" x 8.5" 90 cu. in.
EV180 75-180 Rio 3100 
Mag-Drive 7
20" 6.0" x 9.2" 135 cu. in.
EV240 100-240 Mag-Drive 12
Iwaki MD40RLT 
26.2" 6.9" x 10.5" 320 cu. in.
EV400 150-400 Gen-X / Mak4 
Iwaki MD40RLT 
Iwaki MD55RLT 
32" 6.75" x 10.75" 475 cu. in.
EV1000 350-1000 Iwaki MD70RLT  32" 9" x 12" 750 cu. in.
EV2000 up to 2000 Iwaki MD100RLT  42" 9" x 12" 1100 cu. in.

AquaC Protein Skimmers in Use
This is one reef aquariums where the AquaC prototypes are tested on.

AquaC EV90

At the time of the picture, this aquarium had been running with an AquaC EV90. Note that this aquarium is fairly heavily stocked. After this picture was taken, quite a bit more livestock has been added to this aquarium. Currently, an AquaC EV150 is running on this well-overstocked tank. AquaC feels that this the EV150 is probably not neccessary for the tank, but they feed their tank quite aggressively to keep all the fishes that has been added healthy and wanted to keep maintenance at a minimum. According to AquaC, maintenance on this aquarium has been extremely low.

The AquaC EV-150 protein skimmer working on our aquairum:

AquaC EV150

Please note the dry consistency and quantity of the foam being collected by the AquaC protein skimmer. This drain cup is being filled on a daily basis. There is a convenient collection cup drain connector that allows you to drain the the waste collected in collection cup into a waste container.

This particular model stands only 20" tall, so it is extremely easy to place this skimmer underneath most aquarium stands. Even the model EV200 fits very easily under most aquarium stands.

The AquaC EV skimmer working in one of our customer`s tank:
AquaC EV Skimmer

What's in the Box

  • Skimmer body
  • Collection cup with drain fitting
  • lid for collection cup
  • Rubber gasket
  • Gate valve
  • Instruction sheet

Manufacturer Info

AquaC Aquarium Supplies
AquaC was founded in 1998 as a small one-man operation in San Diego, California. The company has since grown to become one of the leading protein skimmer manufacturers in the United States and sells thousands of units globally every year. AquaC`s 5,000 square foot production facility in San Diego sets the standard in technology for acrylic fabrication. They use precision CNC machined parts and advanced thermoforming techniques to build products of unmatched quality and value. The company`s focus has remained the same after more than a decade in business: to provide high-quality products and top-notch customer service to customers with each and every transaction.


Manufacturers Warranty: 90 days from date of purchase

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AquaC EV-120 Protein Skimmer with JG fitting Reviews

Average Rating
(20 reviews)
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of 2

Old Crab

Reviewers Rating Average

Posted: 11/17/2014 from Sierra Vista, AZ UNITED STATES
3.0 5
Experience Level: Intermediate

Comments: Have been trying to use the skimmer for about a week. Would not produce enough bubbles to get skim. I ordered with Mag 5 pump but when I got it AquaC's manual with the unit it had been updated to say the 120 worked better with a Mag 7. So I am now trying to make a deal with MarineDepot to exchange the pump for the 7 with just the cost difference. I am now running the 120 with a Mag 12 I had for back-up and trying to get it to work. Because it is so over powered it is really hard to get it tuned just right (really touchy to small inputs. I have a feeling that when I get the Mag 7 it will work just fine.

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Great Skimmer

Reviewers Rating Great

Posted: 3/28/2013 from MORGANTON, NC UNITED STATES
4.0 5
Experience Level: Intermediate

Comments: I bought this skimmer to run on my 55 gallon reef and I could not be more happy with it. The only reason i did not give it 5 star is because they say the mag 5 will run it but in the instructions it says the skimmer does best with 600gph input. I found this to be true; it does not do very well with the mag 5 and now I have a pump I don't need. I connected a Rio 2500 with a 4' hose to get the flow down around 600 and it was like a whole new product. It fills the collection cup about once every other day and have had 0 nitrates ever since.

2 of 2 People found this review helpful, did you? Yes No

Works great!

Reviewers Rating Excellent!

Posted: 11/12/2012 from CHICAGO, IL UNITED STATES
5.0 5
Experience Level: Expert

Comments: After the initial break-in period, the skimmer works great. The mag 5 works great on a 45g adequately stocked reef tank though AquaC says the ev-120 can be "supercharged" with the mag 7. No complaints thus far with mag 5 performance. The gate valve and air valve are very sensitive so you can fine tune the skimmer very well. The skimmer is VERY efficient so don't think the lack of a Venturi or a needle wheel is a detriment. Note with the JG fitting: if you don't have a reactor hooked up to the skimmer initially, you'll need to tape the fitting closed so that no air may enter. Otherwise, the ball-valve air intake fitting is rendered useless. Also note that the collection cup is completely sealed save for the drain fitting. You will need to leave the drain fitting open or attach it via tubing to an open top collection jug as this is the only route through which air may escape.

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works as promised

Reviewers Rating Excellent!

Posted: 3/1/2012 from Sebring, FL UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: I finally bought this after careful consideration. I have noticed much more foam production after one week. I think overall it is worth the investment. I would recommend it highly

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Not worth it

Reviewers Rating Below Average

Posted: 2/13/2011 from Voorheesville, NY UNITED STATE
2.0 5
Experience Level: Expert

Comments: This skimmer is very difficult to get working in a consistent manner. I bought it to replace a older model Euro-Reef and after two months of endless frustration, I put the old skimmer back in my tank. The skimmate cup is extremely difficult to clean. The skimmer also is highly variable in bubble production, depending on the water level in your sump. The large valve that controls the outflow was threaded such that it was impossible to keep the valve on top. I took the valve pipes apart a number times and wasted at least a whole roll of Teflon tape. Either it would tighten to a 45 degree angle, or loosening it one full turn made it flop down. If you enjoy tinkering with your tank all the time, then buy this skimmer. Else, avoid it at all costs.

1 of 3 People found this review helpful, did you? Yes No

Great skimmer!

Reviewers Rating Excellent!

Posted: 10/7/2010 from NEW YORK, NY UNITED STATES
5.0 5
Experience Level: Expert

Comments: Have had it for more than 2 years and it it's been a great skimmer. I usually get a cup or so of dark skimmate every couple days. I drive it with a Danner Mag 5. Overall a great skimmer

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Reviewers Rating Excellent!

Posted: 9/15/2009 from WALNUT CREEK, CA UNITED STATES
5.0 5
Experience Level: Expert

Comments: Once the tweaking ends, after a day or two, the performance of this puppy is awesome! Bare in mind, however, that tweaking can be a bit challenging at first: getting just the right amount of air to produce the bubble thickness consistency desired, placing/raising the skimmer high enough above the water sump level for consistent performance, placing the skimmer pump away from the direct return of the skimmer so as to avoid excessive wet bubble production. The results are well worth it; My corals and fish looked as if rejuvenated by the new cleaner and now highly oxygenated water.

0 of 1 People found this review helpful, did you? Yes No


Reviewers Rating Excellent!

Posted: 6/26/2009 from MEDLEY, FL UNITED STATES
5.0 5
Experience Level: Beginner

Comments: Buy the best and you will never have any problems. The unit is great and my tank looks great.

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Excellent Product

Reviewers Rating Excellent!

Posted: 3/6/2009 from GLENDALE, CA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: This package is a bargain. Protein Skimmer is very efficient and does not make a lot of noise like other skimmers. Highly recommended for hobbyists from beginners to experts.

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AquaC EV120

Reviewers Rating Excellent!

Posted: 5/11/2008 from DERIDDER, LA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: I am so glad I bought this skimmer it works great. It has no moving parts at all, so it should last a lifetime. If I were to buy another I would get one with a mag 7 pump though. The instructions in the box recommend the 7 for max performance. The mag 7 will allow you to overdrive the skimmer. If you are looking to buy a new skimmer dont hesitate, buy this one with a mag 7 pump. You will be happy you did.

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