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Thread: $1 Store Gravel
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post #2 of (permalink) Old 08-11-2012, 07:03 PM
Diana
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I do not know if these are limestone, or not. I have seen them, they look tumbled or coated to be shiny. If they are tumbled then the only question is if they will alter the mineral levels. You would have to buy the ones you like and test them yourself. If they are coated I am not sure I would want them in a tank.
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