Sis,
Judging from your posts, I saw conflicting statements and it leads me to believe that you may not have full understanding of your own logic.
Precipitation = 沉淀 or Mendakan in Bahasa.
Meaning of Precipitation from Google: cause (a substance) to be deposited in solid form from a solution.

Breakdown ≠ Precipitation.
Now, back to your theory that you very much insisted ,
Chlorine "oxidized" with Potassium or Magnesium or others and they precipitate. When Chlorine "oxidized" with Potassium (just take Potassium as example), what is the name of the "oxidized" compound and is it soluble or insoluble ?
You seriously need more convincing explanation to prove your theory is not a deceit.
Up to now, none of the sources you provided explain Chlorine "oxidized" with Potassium or Magnesium or others and they precipitate.
And now the latest logic from you, UV remove Chlorine

Such nonsense. Do you really want to go such low just to promote the UV equipped water filter you were selling?
I have no problem with eSpring, you can share informations about eSpring, Zheilwane can share informations about aquaphor. No problem at all, but you can't post unsubstantiated and fabricated informations to deceive the forum. One or two ignorant ones is excusable but I don't think you are one. It's quite apparent that you are fear mongering with personal agenda and undermining the drinking water quality standard of Malaysia.
Let me recap all your deceiving and misleading posts in the forum:
1) You told the forum Culligan IC-EZ-4 is a RO filter. Which is obviously not.
2) You conveniently ignored the proper hospital clinical waste treatment management and told the forum that hospital clinical waste are being thrown and poured into river. ( This is a very serious allegation)
3) You conveniently ignored sewage treatment plant and told the forum that household medicine waste poured or washed into the river when it rains
4) You told the forum that treated city water contains "little medicine".
5) You told the forum that UV remove Chlorine.
6) You told the forum that "Chlorine precipitate", water pipe full of bacteria, you recommend the use of UV filter. I quote you here:
Sis, don't spread lies in the public forum. Not worth it.