Note: Please stop read this article, and read our updated shower filter article instead
I wanted to post an update on my quest for the best shower filter. I received a lot of useful comments on my last shower filter post, and I’ve also tested a couple of new shower filters.
The shower filter market is huge, and sales are dominated by shower filters that use KDF (Kinetic Degradation Fluxion). However, KDF filters don’t actually perform well as shower filters. They often get clogged after a few months of use. Also, they don’t perform well in hot water, and they don’t remove chloramines (which is commonly used in place of chlorine in tap water). Also, KDF filters are also affected by water pressure. When the water pressure is not high enough, water can’t pass through the KDF powders.
Tests include before and after total residual chlorine levels using a digital chlorine meter to measure the results. The shower filters are tested for their ability to remove total residual chlorine in an actual residential shower unit.
You can read about his results here.
The best performing shower filters were: two Vitamin C shower filters, and the Sprite Shower Filter — these filters removed about 99% of the chlorine in the water. (He didn’t test for the removal of any other contaminants.)
ReviewGuy concludes by saying:
I welcome any of my readers to verify or debunk the claims I have made in this comparison by conduction your own independent research & testing. This is an open invitation that includes everyone from the end user to shower filter manufacturers. To date, there has not been a single person or company that can or will refute my data.
However, there are a few new shower filters that have appear in the market since 2006. In my opinion, the best shower filters today are combination filters that use both Vitamin C filters and chlorgon or ceramic filters.
What is Chlorgon? It’s a combination of calcium sulfite with a ceramic binder to form non-soluble ceramic sulfite beads.
Vitamin C (ascorbic acid) is really the best at removing chlorine and chloramines. It removes 99% of the chlorine in both hot and cold water, and Vitamin C filters last about twice as longer as KDF filters.
But Vitamin C filters only neutralize chlorine — they don’t filter out anything else in shower water. To remove VOCs and heavy metals, you have to add a ceramic or chlorgon filter. See the detail in the shower filter update.