JBL ProFlora CO2 Taifun Inline 12/16

Carbon dioxide is the plants’ main nutrient and it fully promotes their growth. Plants use CO2 for photosynthesis and this supplies the water with essential oxygen. The very small CO2 bubbles dissolve very well in the water and save about 20 % compared to other CO2 diffusers.Easy to installThe direct diffuser needs to be integrated into the hose as close as possible to the external filter canister in order to extend the distance of the CO2 in the hose as much as possible.

eBay