The Dupla  CO₂ Reactor S is a product of the highest quality and reliability. Stringent and constant quality control in the production process in compliance with ISO 9001 results in a product with a long life cycle.

The  CO₂ Reactor S is perfectly suited for the optimum and almost maintenance-free  CO₂ fertilisation in large aquaria. In conjunction with the Dupla CO₂ magnetic valve and the control devices Dupla pH-Control Delta or pH-Control Alpha, it forms a fully automatic, intelligent  CO₂ fertilisation system for aquaria.

The design enables this reactor to be placed outside of the aquarium in a cupboard for instance, therefore keeping the aquarium just for the fish and plants.

When used in the aquarium or filter sump, the diffusion capacity may be reduced in a similar manner to the Reactor 400 by enabling various vent points along the body.