ATB Aquarium Technik BURIAN
Polní 1137, 691 42 Valtice

Calcium reactors and kalkstirrers

Ca Reactor Medium Size

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Catalogue number: 30002
EAN: 8594197900561
EAN (red): 8594197900578
Suitable for system volume up to:  
Low bio-load
2000 l
High bio-load
1500 l
Performance: 32 W
Dimensions: 360 x 240 x 550
Weight: 5.10 kg
For tanks up to: 2000 l
Warranty (months): 60
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Ca Reactor Medium Size

Introducing the brand new, third-generation ATB calcium reactors. This innovated range of our Ca reactors uses the Airstar Return Pumps, renowned for its robustness and durability in environments where abrasive substances such as sand or gravel are very common and can be released from the reaction vessel. Airstar pumps provide sufficient pressure that is essential for the optimum functioning of the calcium reactors. Newly, our reactors are equipped with a removable and maintainable filter screen and can be equipped with a foam filter at extra cost. The lid is designed to be easily removable when replacing the media and cleaning the reactor, and to ensure adequate sealing of the entire system. The reactor also includes a pH sond holder in the lid.


Thanks to the unique ATB design, the reactor creates a vacuum and draws water from the tank itself and then returns it to the tank after enrichment. Flow velocity can be easily controlled by continuous flow rate control of the reactor pump and integrated ball valve. This saves a significant amount of money that otherwise would have to be invested in the additional pump. Our reactors are made with high precision and tightness and are therefore also suitable for external use outside the filter sump.


  • Innovative design of the lid and reactor sieve for easy maintenance and ensuring watertightness
  • Venturi nozzle for sucking water from the filter into the reactor
  • Waterproof design for the possibility of placing the reactor outside the filter
  • Foam filter insert (extra fee)
  • Powerful and durable Airstar 4000 W pump
  • Input for pH probe in lid
  • Integrated bubble counter
  • Reaction media content 8 kg

We recommend

Medium for Calcium reactors Calcar 60. Particle size approx. 3 - 10 mm

ATB set and bottle for connection of the Ca reactor to CO2

Notes: Try to avoid dispensing high iodine content near the white PVC parts Never remove calcium water from the reactor directly to the pumps. Doing so may cause their damage, due to calcium deposition.

WATCH OUT for replicas of the original and patented ATB design.


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