Is obsidian rock safe? - The Planted Tank Forum
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post #1 of 4 (permalink) Old 04-19-2013, 01:05 AM Thread Starter
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Is obsidian rock safe?

I have found some black and red obsidian rock online that would look awesome in my planted tank. Does anyone know if it is safe?
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post #2 of 4 (permalink) Old 04-19-2013, 01:12 AM
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Yep, safe as can be.
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post #3 of 4 (permalink) Old 04-19-2013, 02:42 AM
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The only unsafe aspect of it might be very sharp edges which could injure some fish.

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post #4 of 4 (permalink) Old 04-19-2013, 04:01 AM
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Obsidian is as safe as the walls of your tank. Literally. It's volcanic glass. (So heed Hoppy's advice about the sharp edges...)

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