Ciano Bio-Bact Medium x 1

Replacement water clear cartridge for the Ciano aquariums using the CF80 filter, Magi 380, CFBio 150, CFBio 250 or SuperClean 60 & 90 filters. Pack of 1 medium cartridge to maintain the perfect aquarium ecosystem – an excellent habitat for nitrifying bacteria. 1 cartridge will last 90 days.