I had used them and rinsed them for a couple of years before I put them in the Berky - perhaps they were too old. Thanks for the info. // Jane I don't know, I do have a Berkly style water filter and do the same with no problems. My best guess is that you did not rinse them well before hand. http://www.life-enthusiast.com/precious-prills-special-p-1018.html Scroll down to
Directions for Use Hope that helps.
