Wont fix arsenic, and other non-metals, though part of me feels water conditioners are limited to an extent on how much they can remove, and exactly what, but thats another question. Another forum member MSG i know got a oily water surface film when rinsing it. Thats concerning as well. My father has been a forensic scientist, and chemical engineer for over 30 years now. I was going to see if he could study a sample for me to answer my skepticism, and give the results on here for a better answer.
I'm not into the image, but into the hobby...