Quick Answer
Vitamin C (ascorbic acid) media neutralizes both free chlorine and chloramine quickly, but cartridges are short-lived (often 1-3 months). KDF-55 lasts longer and handles hot water well but is weaker against chloramine. Choose vitamin C for chloramine, KDF for longevity in chlorinated water.
Problem
Many areas use chloramine rather than chlorine, and not all media handle it. Choosing KDF when you need chloramine removal (or expecting vitamin C to last as long as KDF) leads to disappointment.
Product Recommendation
ZOOSHEN offers systems with different media configurations. Check each product's specification for the validated media and replacement interval after final validation.