Seems to be working well for us.. We have well water at home and it's not the best.. Previously I would add a few drops of bleach on each re-fill. I'm wondering if the aquabon has anything in it to kill bacteria?.. The label doesn't say. We would get a slight sulfer smell from the well water if I didn't add enough bleach, and a slight bleach taste/odor if I added too much.. When NOTHING is added to the well water, we've actually had a brown discoloration to the water.. So far with the aquabon, no discoloration, odor or off taste.