Tony, I just dug up the WQ report for Calgary last year and those are the numbers it gave. I don't know what it would be after adding salt though, so 400+ is probably accurate.
Now, so as to avoid another one of these threads, the cheapest way to raise levels is CaCl fro Calcium and Baking soda for alk. Cheapest way to maintain is with kalk. Using any type of water for frequent changes costs salt. Salt is more than CaOH2.(if bought in bulk)
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Brad
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