Aquamedic Reefdoser EVO 4 Review

by | Aug 22, 2016 | Equipment, Industry, Opinion, Technology | 0 comments

Aquamedic pump

Germany’s Aquamedic is famous among reefkeepers for being the first company to popularize the automatic dosing pump. As hobbyists realized the importance of supplementing their reef tanks with calcium and alkalinity buffers, the Aquamedic Reefdoser was their first, and frankly, only choice for a dosing pump, other than the ridiculously expensive and huge medical-grade pumps. Despite its confusing and illogical programming, it was a true workhorse, and was highly praised by aquarists around the globe. The company recently announced their new line of liquid dosing pumps called Reefdoser 4 EVO. The doser is designed to compete with the flood of inexpensive, generic-brand pumps that are now available, and it offers some interesting improvements and an attractive price tag. Let’s take a look…

Aquamedic Reefdoser Evo 4

At first look, Reefdoser EVO 4 closely resembles the generic pumps on the market, all  based on the original design by another German company, GHL, and their Profilux dosing pumps.


But upon further inspection, we see that Aquamedic’s pump is far from carbon copy. The most significant improvement on the standard design is the controller- instead of sitting inside the main body, it has its own cord and can be mounted away from the main body. This clever idea is a welcome change and a strong selling point; anyone who has used a doser will agree that having the display and controls cramped next to the pump’s heads is not ideal. Not only is it unattractive, but having to deal with a spider web of dosing lines just to change the daily dosage is quite frustrating – with this redesign, you can mount the controller with its built-in numeric display away from the dosing pump’s box. The cord is long enough to hang the controller on aquarium stand’s side or even on an adjacent wall.



The Reefdoser EVO 4 has four peristaltic pump heads that can be programmed independently on a daily and/or weekly schedule, and it can be expanded with a (sold separately) “slave” unit, increasing the total pump count to eight. Perhaps the biggest shock is its price: the main unit sells for approximately $200, while the expansion module costs around $125. It’s quite important to mention it upfront, because that pricing scheme places Reefdoser EVO 4 squarely in the the “affordable dosing pumps” category. Let’s take a closer look at the unit to see what hides behind its attractive price point…


Aquamedic Reefdoser Evo 4

The doser comes in a nice, “clean” looking retail box, complete with a picture of the unit and some basic information printed in three different languages (French, German and English). Inside, we have:

  • Base unit featuring 4 dosing pump heads, some indicator LEDs, a RJ 45 (Ethernet) port to connect the remote controller and a smaller telephone jack for (sold separately) expansion modules
  • A remote controller with alphanumeric display, 6-button control, and a 6 foot  (2m) long cable
  • Roughly 13 ft of good-quality silicone tubing
  • A power brick that (surprisingly) comes with adapters for different power plug standards
  • Printed manual
  • Some double sided tape for mounting purposes


The main unit, where all four pumps sit, will look very familiar to anyone who has had experience with the mass-produced Profilux dosers, but the overall build quality and the “velvety” finish on both the main body and the controller keeps reminding me that it’s an Aquamedic product. The pump heads are removable (for cleaning and lubricating) and replaceable; Aquamedic sells replacement heads through its network of vendors.

Aquamedic Reefdoser Evo 4

The remote controller, especially in this price class, is a welcome and very useful addition. After all, I think we can all agree that dosing pumps are an eyesore and something you’d like to hide in the darkest corner of the aquarium stand. But the dosing regime does need to be adjusted from time to time, and having an easily-accessible control interface saves a lot of frustration.

Aquamedic Reefdoser Evo 4

The controller is functional and easy to operate, with a tv remote-style layout that offers a quick way to change settings and mechanical buttons that are very responsive. The only downside of the controller is that it’s kind of bulky by today’s standards, a thing to be aware of if you plan to mount the controller on the front of the stand.

The high-quality tubing that comes with the package (all 13ft of it) is of the flexible, non kinking variety; so important in these dosing pump systems.



Aquamedic Reefdoser Evo 4

Programming Aquamedic Reefdoser EVO 4 is as straightforward as it can be. To begin, you enter the date and time of day (which was already correct in my case, mostly likely due to an internal clock memory). Then, there is only one other option in the menu, labeled simply “Set program”.

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The program follows few simple steps – first, you choose which pump you’d like to program, then the dose-per-day number, anywhere between 1-24 individual doses per 24 hour period. Next, you set the “Days interval” with numbers between 0-30. Zero means there is no interval and the dosing regime will be repeated every day, “1” means one interval or one dosing scheme every other day, and so on. Step three, you determine the dosage volume on a scale between 1-9999 ml, with 1 ml increments. Finally, the dosage time for each individual dose is set. Hit “Enter” to finalize the program or “Esc” to return to the previous step.

There are two additional modes in Reefdoser 4 EVO, both of which should be standard in quality dosing pumps. The “manual” mode lets users turn any pump off/on manually, regardless of the saved program. Simply press the left arrow button to enter manual mode, choose the pump you wish to “override” and press & hold “Enter” to engage pumping.

The other mode, initiated by pressing the “Up” or “Down” buttons, takes users to a calibration mode. The pumps come calibrated by the manufacturer, but if you suspect the accuracy is off, you can follow the calibration process and tell Reefdoser the actual time it takes to fill a 100ml test tube, in effect calibrating the given pump head.


Aquamedic Reefdoser Evo 4 testing

I set up a makeshift lab to test the accuracy of Reefdoser EVO 4 pumps. It consisted of a feed container and two measuring cups with scale that I normally use as dosing vials in my tanks. The liquid of choice for this test was dihydrogen monoxide (H2O).

For the first test, I set pump 1 to dose 25 ml. Results: it dosed slightly less, approximately 24-24.5 ml. I calibrated the pump using the Reefdoser internal calibration mode and the second time it gave me the correct, 25 ml dose.

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For the second test, I wanted to simulate a smaller tank, so I set pump number 2 to dose 5ml of liquid into a small cup. This gave me an accurate dose on three separate doses.

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The pump heads, while operating, make a very light humming noise, nothing you would be able to hear if it was inside the fish cabinet.


Aqua Medic made a bold move by introducing an inexpensive, generic-looking dosing pump to its line of generally more sophisticated and less affordable products. However, there is something that makes it stand out from the crowd; I would define it as the Aquamedic “badge”.


There is nothing revolutionary about Reefdoser Evo 4, but compared to other budget pumps on the market, the difference this “Aquamedic badge” brings is quite obvious. The main unit feels solidly built, the pumps are accurate and make very little noise, the remote controller is a great idea that features a simple programming scheme, and the included feed line is of a quality seen only in the higher price range dosers. All that for a price that matches the imported dosers popular amongst hobbyists. I think the Aquamedic team has really done their homework, and they’ve re-engineered a standard design with great success, adding useful features in the process.


Given AquaMedic Reefdoser EVO 4’s attractive price and the fact that it is a solid, well thought out and executed product, I have no issue recommending Reefdoser EVO to anyone looking for a good quality, budget dosing pump. It seems to be the best value in its price class and it is backed by Aquamedic’s excellent customer service. Each unit comes with 1 year warranty.

To learn more about Aquamedic Reefdoser Evo4, visit the Aquamedic product page 


  • Marcin Smok

    Marcin Smok is a reefer, photographer, traveler, SCUBA diver and avid DIY-er. He has been keeping freshwater fish tanks since he was 9 years old and saltwater tanks for the past 10 years. Check his photography site at and follow his Facebook profile


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