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Tunze Calcium Dispenser 5074 Tunze Calcium Dispenser 5074

Product Code: RTZ50740
The Tunze Calcium Dispenser 5074 is for adding calcium to a marine aquariums. The calcium hydroxide is dissolved in a storage container (not included) by means of the water jet of the metering pump included with the Osmolator (not included). The calcium dispenser is fitted between the metering pump and the feed hose supplying the lime water to the aquarium in small volumes in regular intervals. This method will keep your top off container clean of kalkwasser.

The calcium dispenser can be fitted in any water storage tank and should be topped up with calcium hydroxide every one to two weeks. The calcium dispenser and the calcium reactor can be combined. An especially stable pH is achieved during the day as well as at night.


Our Price: $104.99
In Stock
Tunze Calcium Reactor 3171 Tunze Calcium Reactor 3171

Product Code: RTZ11400
The Tunze Calcium Reactor 3171 is used to dissolve calcium granulate to raise the Calcium levels and hardness in a marine aquarium. Requires a CO2 system and calcium media (not included). It's suitable for cabinet systems and aquariums up to 317 gallons with a granulate capacity of 0.4 gallons.

The Calcium Reactor 3171 is self priming, which significantly facilitates its operational start. The water flow rate is adjusted prior to the granulate, and will thus remain very consistent over time. It's equipped with a reabsorption function for the undissolved gases, and therefore consumes very little CO2. Contains a special connector for an internal pH probe.


  • For aquariums up to 317 gallons
  • Granulate capacity of 0.4 gallons
  • Dimensions: 9.1" X 5.9" X 13.8"
  • For external or in cabinet operation
  • Cable length: 2.2 meters
  • Requires a CO2 system and calcium media (not included)

Our Price (price includes free shipping!) $464.99
In Stock