Loose Media Refill for Aquatiere's Chrome Shower Handset-(Ceramet) Hydrogenating

I purchased the Hydrogenating Refill Pack in addition to the chrome showerhead, to eliminate doubling up on P&P costs, and I'm glad I did. If I'd paid £4 postage for the small handful of beads received in a press seal bag, I wouldn't have been too happy. I was hoping to receive literature along with the showerhead and refill pack explaining more about the science behind the materials, what the beads are actually made of, and perhaps some independent test results to back up their claims, but alas the literature included was very basic. I really hope these will be a great set of products and that the beads do remain active for the approximately 12 months promised, as I have had a string of disastrous filter shower heads recently of various brands which all promised the world and delivered nothing.