Edmonton water is running at 150ppm right now according to my TDS meter. But it changes seasonally, and you never know what you might get in tap water, if the treatment plant needs to, they dose chemicals to control algae outbreaks and such.
So I say Bad Idea, for long term success go with distilled, RO, or RODI. And you might as well set yourself up for success from the beginning, because believe me you are going to have your share of trouble with a new tank as it is.
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