Good cartridges for one who didnt carafe brita maxtra. if indeed that is not based al location of the cartridge and a centimeter of water stagnates on the bottom cartridge location .. each filling of water must be removed the cartridge thrown water that stagnated Indeed, as the filter cartridge removes chlorine, there is a risk of bacteria growth if water stays too long in all carafe.çà the world knows. by against my son has a simple and britta these cartridges work well for this decanter so !! I have been a happy one. Good cartridge, but not for the carafe brita maxtra.