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post #17 of (permalink) Old 10-22-2009, 01:07 AM
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Originally Posted by koop View Post
They are local stones from Northern Minnesota. I only know about them because I'm a white water kayaker and they are from a small rock island between two class 3/4 rapids. The island is only accessible when the water is low a few months of the year because you must climb down a 20 foot ledge/waterfall and cross the rapids to get at it. It's inaccessible by kayak because the rapids are too swift. I'm going to do a two week ph test on them starting tonight to see how they affect water quality. They've already passed the vinegar test.
lol things we do for fish


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