I go through a lot of topup too, lots-o-evap. AFAIK, Calgary still doesn't use chrolamine (should be able to check calgary.ca to doublecheck though), nevertheless I use RO/DI though just to avoid seasonal fluctuations if nothing else. I did run tapwater for a long time though without ill effects, but I like using RO/DI better.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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