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For an economical and direct plant fertilisation: CO2 diffuser for external filters Easy to install: connect to hose of external filter. Exact dosing: integrated bubble counter, no water backflow thanks to backflow stop 20 % CO2 saving due to an especially effective diaphragm. Package contents: 1 ready-for-connection high performance CO2 direct diffuser.
Juwel Biopad Bioflow S Aquarium Mechanical Filter Media
Jbl Proflora Direct 63339High Performance Direct Diffuser For 12/16Inline Co2Diffuser, 6333900, Pet Supplies