Water filtration for shower. KDF-55 vs Vitamin C

Ok, I need help form a qualified dermatologist or traditionalist. My apartment water is horrible, smells like chlorine, I can see white flakes floating around in it.

I have been researching shower heads to start with. Some sites say Vitamin C is better for a shower head filter to remove 100% of chlorine. Some sites say KDF-55 Media is effective in removing 90% of chlorine and 80% of other harmful heavy metals.

However, I have found some website that say KDF-55 is actually a harmful substance that will leach harmful chemicals back onto your skin.
Likewise, I have found sites that say Chlorine + Vitamin C = Acid.

Can someone please explain the science behind these shower heads?

Here are the two that I ordered.

Vitamin C
http://www.amazon.com/VITASHOWER-SF-1-Vitamin-Shower-Filter/dp/B001L40UJA/ref=sr_1_8?ie=UTF8&qid=1308447149&sr=8-8

KDF 55

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&_trksid=p4340.l2557&rt=nc&nma=true&item=200602397382&si=moYpBR4YbBhKzGDpBAFmbfl%252FmKE%253D&viewitem=&sspagename=STRK%3AMEWNX%3AIT
(Strange, Why is this banned in CA?)


Further Reading
KDF main page
http://www.kdfft.com/products.htm

[Stevef22]

sry, meant to say dermatologist or nutritionist