Planted Tank Guru
Join Date: Jul 2010
Location: British Columbia, Canada
More and more city &/or municipal water supply facilities are using chloramines instead of straight chlorine, or a combination of chlorine and chloramines for sanitizing tap water, so do check with your local supply - as was said, don't assume they're not adding chloramines.
A number of inexpensive de-chlorinators, containing only Sodium Thiosulfate, will only deal with effectively with chlorine, but not chloramines, whereas Prime and Safe deal with both chlorine and chloramines, as well as mitigating, or neutralizing, the toxicity of ammonia, nitrites, and nitrates when used in the proper dosages.
I believe Safe is much less costly than Prime, so should save you money, but I haven't used Safe so not sure.
Better to be safe than sorry, in my view, particularly if keeping discus, as I do, or Altum Angels, as examples.