10 Reservoir 2 Disc Diffuser Ceramic Reactor Slice, 3cm

The CO2 diffuser must be screwed in as tightly as possible during installation.
Replacement CO2 diffuser disc, high density with silicone sealing ring, does not clog easily.
Available towing sizes: Dia. 3cm / 1.18in
Important: The CO2 diffuser may release 1-3 bubbles during use. When the ceramic becomes saturated with water, it will release CO2, which is normal and may take up to 3 days.
Helps ensure plants receive adequate amounts of CO2, improving the growth and health of your plants with a sufficient supply of CO2.