If you’ve spent any time on TikTok lately, you’ve probably seen dozens of newly-converted people who now swear by shower filters. And in a few minutes, you’ll believe the hype, too. Let me explain.

Caroline Roberts writes articles and notifications for CNET. She studies English at Cal Poly, and loves philosophy, Karl the Fog and a strong cup of black coffee. Caroline Igo (she/her/hers) was a ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Tim Heffernan Tim Heffernan is a writer who covers air and water quality and ...