That is one of the most expensive ways to dechlorinate. I think it's 5ml to 20l if I recall rightly? Prime and pond dechlor cost about the same price, but 5ml treats 200l!
Ouch to being on a water meter with this problem
Curious about the boiling up pans comment, do you not have a hot water supply?
Ouch to being on a water meter with this problem

Curious about the boiling up pans comment, do you not have a hot water supply?