The Planted Tank Forum - View Single Post - Are these rocks safe for a planted tank?
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post #29 of (permalink) Old 02-11-2013, 06:29 AM
Planted Tank Obsessed
Join Date: Dec 2010
Location: Fayetteville, AR
Posts: 333
Originally Posted by lochaber View Post
I don't think there is any serious risk of explosion from boiling a rock. At most I can see cracking from thermal expansion.

If I had a good reason to boil a rock, I wouldn't even hesitate, just find a pot big enough, and fill it with water, and fire up the stove.
There are some rocks that are dangerous. Rocks like lava rock can have air trapped inside that can explode when boiled. I agree that the warning has been exaggerated, as most rocks are safe to boil, but there are a few that aren't.
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