A particular diffuser for skimmers by RedStarFish

By danireef 4 years agoNo Comments

RedStarFish diffuser

We met RedStarFish during CIPS 2017 and, in addition to their fine manufacturing, we were especially interested in the new diffuser that they built themselves.

A diffuser is a tool that spreads the bubbles in the body of the skimmer, right after the exit of the pump. It has a particular importance for the diffusion of the bubbles, and both the size and the “turbulence“are important. In hydraulics, the term turbulence refers to how often the water particles collide.

The diffusion plates have a series of holes that serve to spread the bubbles in the area above. RedStarFish had the intuition to develop the simple design of the holes using conic-cylindrical fissured shapes.

We really liked the result in the skimmers on trial in the booth. The foam seemed plentiful and well distributed.

The new RS-N Plus skimmers by RedStarFish

RedStarFish diffuser skimmer

There are three skimmers designed for this diffuser, which is named RS-N Plus, and they are the RS-N130 Plus, the RS-N170 Plus, and the RS-N230 Plus.

Model Recommended aquarium Pump Pump consumption Dimensions Aspirated air
 RS-N130 plus  400-500 liters  HP-1500L  12 watt, DC 24V  200x190x485 mm  600 l/h
 RS-N170 plus  500-700 liters  HP-2500L  25 watt, DC 24V  230x210x530 mm  900 l/h
 RS-N230 plus  800-1,000 liters  HP-4000L  35 watt, DC 24V  285x260x600 mm  1,450 l/h


I think the name of the model indicates the diameter of the body of the skimmer. The numbers RedStarFish declares seem to be very competent. The values of the aspirated air are realistic, so we wanted to suggest to you the recommended aquarium sizes too. But for hard corals SPS, you should probably consider half of the minimum value.

But it’s the foam that is really the star here, as you can see in the following pictures:

The pumps are electric, and, according to their names, capable of a flow rate of 1,500 l/h for the smaller and 4,000 l/h for the bigger. If used with a brush impeller, the numbers are very different.


We can get a closer look at these skimmers in the pictures below, and appreciate the quality of their construction.

The skimmers of the series RS-C

RedStarFish has, in addition to these skimmers, more traditional skimmers in the RS-C series. There are 5, with increasing characteristics.

They are skimmers with regular direct current pumps, with treated air of a minimum of 600 l/h and a maximum of 3,600 l/h.

Their catalog has quite a few other products, including a triptyque of beautiful acrylic sumps.

There are three models, D-50, D-80, and D-100. The length in centimeters is expressed by the number of the model; they’re all 45 cm wide and 38 cm high, and have lengths of 50, 80, and 100 cm.

And again, more algae reactors.

RedStarFish algae reactor

And enormous skimmers for industrial purposes.

RedStarFish skimmer


For more informations you can visit the RedStarFish official page. We’re also providing you with the link to our editorial of CIPS 2017.


[translated by Agnese Poggi]

  Equipment, Industry


  (279 articles)

Danilo Ronchi, aka DaniReef lives in Italy where he is a hydraulic engineer, but his love for reef aquarium and photography prompted him to begin to write about marine aquariums in 2006 and he published his first book "Marine Aquarium". Since 2007, Danilo has been writing a blog danireef.com where he publishes articles, pictures, product reviews, aquariums coverage, reportage and history of his tank. Now he's happy to be part of Reefs.com

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