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Tunze Macro Algae Reactor 3181

Product code: 8013

Availability: In stock

Ships Tuesday, May 26 if ordered in the next 1 day, 4 hours and 18 minutes!

Regular Price: $349.99

Special Price: $334.46

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Tunze Macro Algae Reactor 3181

The Macro Algae Reactor MAR 3181 is specially constructed to cultivate algae in seawater and plants in freshwater.
Chaetomorpha "Spaghetti Algae" is cultured by many marine aquarists to eliminate nitrates and phosphates from the aquatic biotope. It is absolutely sufficient to harvest a handful of algae from time to time to maintain the biological balance in an aquarium – an economical and easy alternative to many chemicals or resins.
Naja Grass, Najas guadalupensis, can be grown to purify freshwater systems,
such as cichlid biotopes.

TUNZE® MAR 3181 can be placed in any filter basin or next to the aquarium without external filter technology.
The water circulation in the reactor ensures the rotation of the algae culture and thus reduces the number of light sources accompanied by strong plant growth. However, additional light sources can be added to the device as needed.


For aquariums from 100 to 600 liters (25 - 160 USgal.).
Flow rate: 500 - 1,200 l/h (132 - 318 USgal.)
Energy consumption with pump: approx. 20 W
Measurements of the reactor (L x W x H): 233 x 195 x 422 mm (9.2" x 7.7" x 16.6")
With Comline® Pump 2500 electronic and Turbelle® Controller basic 7090.200.
Functions of the TUNZE® algae reactor MAR 3181:

  • Cultivation of algae in seawater and plants in freshwater
  • Biological detoxification of ecosystems by algae / plants
  • Reduction of nitrate and phosphate content
  • Filtration of the aquarium water
  • Production of food supplement for fish
  • Zooplankton refuge, serving as food for corals and fish
  • Enrichment of the water with oxygen

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  1. Typical tunze quality Review by bradley
    Product Rating:

    Works great. I have it running in my sump and it fits with my big skimmer in the waterbox 70.3 (60 gallon cube) sump. Light is super strong and only one is needed. Seal is very solid and is magnetic with screws. I don't trust any device outside of a sump. Silicon tubing for the water lines is great. Make sure the outlet is at or slight above the water line for optimal flow. I am running OGO red algae. It does not spin. IF you loosely rubber band the algae with a couple of rubber bands it spins well. Tunze customer service recommended adding chaeto as potential solution as it is much denser and would attach and spin the OGO. I will be doing that in the next few days. Right now the OGO appears to be growing and healthy:)) I would recommend the bigger size for aquariums greater then 60 gallons, even though the smaller one is rated for much bigger tanks I would want more reactor room. (Posted on 11/4/2019)

  2. Love It Review by Blenny1
    Product Rating:

    Very easy to set up and top quality.
    It’s not cheap but I am very happy to purchase this product. (Posted on 9/2/2019)

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334.46 In stock