I'm just going by what the techno guy from pozzani said. And if brine doesn't work then it's worth a try if the cartridge is used up anyway. I'm gonna try recharging one of mine with brine first and test it. Then if that fails I'll use a bleach solution. If the cartridge is spent then got nothing to lose really.I don't think so! I'm pretty sure the medium is an anion (ion-exchange) resin and if you could, you would recharge with a brine (salt water) solution, NOT chlorine bleach.
If all else fails I'll cut one open and see how it's put together. Might give an insight into how best to recharge one.