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  1. J

    Are rocks from city streams/creeks safe once they're boiled?

    true, it's a risk you (we) all take. minimize the risks to a level you're comfortable with, have a backup plan and carry on. maybe put some distilled water in a spare tank. take readings as a control, add a small rock and see what changes (if anything) over time.
  2. J

    Are rocks from city streams/creeks safe once they're boiled?

    to my mind, rocks in a stream or anywhere where the water is constantly refreshed, could well be harmless where they are and also toxic in a tank. maybe much less so than those just 'lying around' but the chance is there.
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