Is A Shower Filter Necessary? – SimpleLab Tap Score
This was found in a Brita water filter with water from a shower head. The brown stuff moves around with the water and isn't stuck. I think it looks kind of fuzzy...
SparkPod Ultra Shower Filter- Shower Head Water Filter & Cartridge- 150 Stage Equivalent, Removes Up to 95% of Chlorine, Heavy Metals for Soft Hair and Skin (Luxury Polished Chrome) : Amazon.co.uk: Electronics
BRITA Maxtra Pro Limescale Expert Water Filter Cartridge, Pack of 3