We recently moved country and there is so much chlorine in the water here, that I had to get a shower filter for my skin and hair. I bought the “best” one my research found and my skin and hair were still dry AND. Now I had red bumps on my face when I got out of the shower! So I did a deeper dive on the research, and one thread comment shocked me . It said “if you are ok with drywall and tofu, the calcium sulfite in the filter should be fine”. I AM NOT OK WITH TOFU AND DRYWALL!! It made sense and I got the Alkanatur filter without calcium sulfite. My skin was better after the first shower. My hair is MUCH better. And I don’t have a red inflamed face when I get out of the shower!!! Thank you Alkanatur. There were some bumps with shipping and Alkanatur didn’t give up until they found a solution and got the shower filters to me. Thank you.