Eheim CO2 Set 400 without bottle

These Eheim CO2 fertiliser units (supplied without bottles) are perfect for the aquarium keeper who wishes to use their own choice of CO2 supply. These simple and easy to use kits come supplied with everything else that you need to dose CO2 into your aquarium. 2 sizes available, for aquariums and aquascapes up to 400 and 600 litres.