Does dechlorinater expire?

Question

While digging in the garage, we found four or five bottles of aquarium dechlorinater. They don't have an expiration date, and I was wondering if dechlorinater even expires at all. I can't tell you how old this stuff is, but it's more than five years.

Answer 1

Nope, it does not expire. As long as it hasn't evaporated down and changed the percentage active ingredient or been allowed to get too hot or too cold it should be just fine to use.

MM