reactor 1000 is a hermetically sealed unit for introducing CO2 into larger aquariums. The universal mounting plate enables it to be mounted outside the aquarium or inside the cabinet. This powerful unit can supply aquaria up to 2,000 litres (app. 500 gallons) with CO2. With 12/16 mm hose. Required pump power: 1,000 – 2,000 l/h. (app. 250 – 500 gal.)