However, since Alasse seems willing to give this filter a try, I assume she has done bit of research herself into the processes involved and the potentials for both good and bad things that they might cause. I assume she has considered the costs involved too. So I, and I assume other readers of this thread, would be very grateful if she could better explain the science behind the product since the literature from the maker is light on this aspect and somewhat confusing. I would be happy for her to explain why some of the objections raised in the links I provided and the opinions I have stated in this thread are of no concern. Please, Al, can you show us why you think this product is worth "looking at" rather than merely saying you do not care what I think about it which gives no help to anybody in understanding the product and why is should be considered. If you need to get a bit scientific, we can start a thread in the scientific section if you prefer?