The Automatic Calcium Dispenser 3170 can be supplemented with a second reaction stage. A Comline housing is fitted with an additional granulate chamber. They can be placed next to each other and can be connected with a hose.
- It increases the efficiency by about 20 per cent.
- It neutralises the carbon dioxide at the outlet of the reactor.
- It increases the granulate volume.
- It permits a higher throughput of water.

For aquariums from 200 to 1,000 l (50 to 265 USgal.) of seawater.
Immersion depth: approx. 60 to 280 mm (2.3 to 11.0 in.).
Filling volume: approx. 2,500 ml (.66 USgal.).
Dimensions: L 113 x W 135 x H 300 mm (L 4.4 x W 5.3 x H 11.8 in.).
Magnet holder up to a glass thickness of 12 mm (.47 in.).