The Kangen water machine has a mechanical filter that filters out solid debris like for example rust flakes contained in the water as well as a activated charcoal carbon filter which filters out biological debris like mould and spores from the water, you can also buy at additional cost a floured filter for filtering out fluoride added to tap water.
There are also other third-party filters that you can add into the hose that connects to the water tap or house water supply to filter out everything from heavy metals, minerals, salts, lead, arsenic, chlorine etc but these are all third-party filters not included with the Kangen machine.
Whilst its claimed that residual chlorine can be removed by the mechanical filter there is no proof to this, itís also claimed that the act of ionising water can remove heavy metals and salts, this is also not true.
The Kangen water filter is sold by independent distributors, these freelance distributors might say that the Kangen can filter out something it cannot or leave the customer thinking that the Kangen can filter something it canít by being unable to effectively answer the customers questions, either way there is a lot of confusion that leads to people thinking the Kangen can filter out a lot more than it actually can.
Kangen water machines are manufactured by Enagic who have been manufacturing water filters since 1974, all Kangen water filters cannot remove minerals or salts from the water, the Kangen uses ordinary tap water and turns this into alkaline or acidic water, it only changes the pH of the water but cannot alter the contents of the water, if the tap water contained traces of lead, the Kangen water would contain traces of lead, this is the same for any water ioniser without specific heavy metal filters.
The latest filter to be manufactured by Enagic is the activated alumina filter, this filter removes fluoride from water as UK water companies add fluoride to the water to prevent tooth decay, the argument against adding fluoride to water says that fluoride in large quantities can be dangerous (as it is toxic in large quantities, but then again these large quantities are not in tap water and indeed most things in large enough quantities will be toxic).
The Kangen machine uses a chemicals to produce what Kangen call strong Kangen water, that is water that has a low pH and is acidic, for this reason most detractors of Kangen machines will say that the Kangen is actually using a chemical process and not electrolysis to make acidic water, all other makes of ware ioniser can only make alkaline water at varying levels of alkalinity by electrolysis they canít specifically make acidic water without using additional chemicals.
A Kangen machine can make or filter if you prefer water to a pH of 8.5 to 9.5 for alkaline water, if your wondering a low pH is acidic and a high pH is alkaline, the opposite of alkaline water is acidic water.