The V2 React 300 is a compact calcium reactor that comes with everything you need to provide your marine aquarium with calcium.
The external reactor simply clips to the side of your tank, saving you vital space in your fish tank. It is ideal for aquariums up to 300 litres (66 UK gallons).
It comes with an integral pump, so you simply clip the water supply intake strainer inside your aquarium or sump with the suction cup.
The V2 React comes with a CO2 cylinder so you don't have to buy that separately.
The CO2 is taken into the reactor and water is introduced at a slow rate. The low pH of the CO2 dissolves the calcium carbonate which is then released into your aquarium, giving valuable calcium to your coral reefs and fish.