Calcium Sulfite
CaSO3 shower filter balls can remove 90% of chlorine from shower water with a surface time of only 0.8 seconds. They work synergistically in combination with the KDF-55 system.
KDF-55 system
Copper-zinc water filtration is a high-purity water filtration process that relies on the redox potential of dissolved oxygen in water in the presence of a zinc anode and a copper cathode.
The main advantage of the KDF-55 system is that it is able to reduce chlorine and neutralize fungi with hot water under high pressure. KDF-55 is the only independently proven technology for high-pressure hot water filtration.
Mineral balls (Crystal quartz)
Mineral balls made of crystal quartz with negative ion mineralization that are claimed to have a positive effect on skin health and smoothness, reduce sebum secretion and increase cell vitality.
Scale inhibitor
Tap water proprietary formula reduces scale by 80% and also prevents scale formation.
Note: This subjectively gives the perception of softer water although it does not reduce water hardness or TDS.