The Chihiros External CO2 Diffuser is the ideal solution for aquarists who value an even, low-loss CO2 supply. Installed externally on an external filter or pump, it ensures efficient diffusion of CO2 into the aquarium water without compromising the aesthetics of the aquarium. The Chihiros External CO2 Diffuser enhances aquatic plant growth and supports a stable aquarium ecosystem.Chihiros External CO2 Diffusor+ The special membrane technology ensures that CO2 is optimally dissolved in the water, making it readily available to plants.+ The diffuser is connected to the external filter and does not affect the design or space available in the aquarium.+ No bulky equipment in the tank - ideal for lovers of minimalist or aquascaping aquariums.+ As diffusion takes place in the filter circuit, CO2 is used efficiently and less gas escapes unused to the surface.+ Constructed from robust and durable components optimised for long-term aquarium use (housing is made of aluminium, membrane is made o