Extra Sources Filter Materials
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KDF 55 — Chlorine & heavy metal reduction (NSF certified)
KDF 55 — Lab test chlorine removal report
KDF 55 — NSF/ANSI Standard 42 certification & product info
Carbon Ball — Chlorine removal by carbon (WC&P Online)
Carbon Ball — EPA & NSF research activated carbon drinking water
Carbon Ball — PubMed study GAC effectiveness
Zeolite Ball — Heavy metal removal (Nature/Scientific Reports)
Zeolite Ball — PubMed review natural zeolite & heavy metals
Zeolite Ball — Household water filter zeolite study
Tourmaline Ball — Far infrared & skin research (NIH/PubMed)
Tourmaline Ball — Far infrared properties in water treatment
Calcium Sulfite Ball — 99% chlorine removal in 0.8 seconds
VC Ball (Vitamin C) — EPA research on ascorbic acid dechlorination
Mineralized Ball — pH balance & trace mineral release study