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AquaC EV-240 Protein Skimmer
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  • AquaC EV-240 Protein Skimmer
  • AquaC EV-240 Protein Skimmer
  • AquaC EV-240 Protein Skimmer
  • AquaC EV-240 Protein Skimmer

AquaC EV-240 Protein Skimmer (no pump)

In stock: Order by 2PM EDT for same-day shipping (M-F only)

Item #: AC1171

MSRP: $549.95 Save: $149.95 (27%)
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Quick Overview

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 a...
Product Description

AquaC EV-240 Protein Skimmer (no pump) Information

Product Manuals & Documentation

Part #: EV-240

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: 26"
  • Recommend Pumps: Mag Drive 12 or Iwaki MD40RLT
  • Footprint: 6.75" x 10.75"
  • Foam Tower: 6" OD
  • Tank Size: 100-240 Gallons
  • JG Fitting: Standard 1/4" JG fitting
  • Bubble Size: .03.05mm
  • Water flow-thru rate: 550gph
  • Volume of foam produced: 320cu.in.
  • 1" hose barb water input
  • 1-1/2" gate valve output
  • 3/4" collection cup drain
  • 3/8" threaded air inlet
  • Gate valve exit is 8-1/2" high

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

AquaC EV Protein Skimmers Comparison
DescriptionTank Size
PumpHeightFootprintFoam Tower Volume
EV12040-120Rio 2100 
Mag-Drive 5
18"4.75" x 8.5"90 cu. in.
EV18075-180Rio 3100 
Mag-Drive 7
20"6.0" x 9.2"135 cu. in.
EV240100-240Mag-Drive 12
Iwaki MD40RLT 
26.2"6.9" x 10.5"320 cu. in.
EV400150-400Gen-X / Mak4 
Iwaki MD40RLT 
Iwaki MD55RLT 
32"6.75" x 10.75"475 cu. in.
EV1000350-1000Iwaki MD70RLT 32"9" x 12"750 cu. in.
EV2000up to 2000Iwaki 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 ta

What's in the Box

  • Skimmer
  • Gate Valve
  • Manual


Manufacturers Warranty: 90 days from date of purchase

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AquaC EV-240 Protein Skimmer (no pump) Reviews

Average Reviews

Customer Reviews

EV240 Product Review by RANDY (Posted on 2/26/14)

Comments: Easy to adjust and produces beyond my hopes. Iwaki 40 pump seems to be a little more than the skimmer can handle. Do install a gate valve on pump discharge as it will be the sole skimmer adjustment. 1" injector upgrade was a nice surprise to see on the unit, though letting one know in advance would have been nice. While a slightly larger skimmer, this unit out-produces my ASM G3 by a factor of 4. Only con is the overflow is set too low in the collector cup and an external collection reservoir is a must.

ev-240 Product Review by ERIC POLSON (Posted on 2/26/14)

Comments: Excellent product! more than adequate for my 180 Gal reef tank.

aqua c Product Review by aquaclean (Posted on 2/26/14)

Comments: Great skimmer!! It is a little pricey but worth.

works great. Product Review by Ollie Smithwick (Posted on 2/26/14)

Comments: I have been using this skimmer for 9 months. The skimmer produces a lot of watery skimate. My nitrates stay between .5 and 1 despite a slightly overstocked 125 mixed reef with a 55 refug. No problems with leaks but there is a small crack in the collection cup probably from cleaning every other day. It does get dirty quick especially in the neck below the collection cup.

great skimmer Product Review by Phil Jones (Posted on 2/26/14)

Comments: I've been using this to skim a small (100 gallons) live rock curing pool. Works great with mag drive 12even better with mag drive 18. Virtually no fiddling required.

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