I had heard that too. Those things apparently can go off like bombs. I'll scrub it really well. Would soaking it in alcohol or bleach be good too?Be careful boiling rocks.....they can explode.
I'd suggest scrubbing and rinsing it really well and then let it soak. Test the pH of the water it's in everyday to see what (if any) affect it will have on the aquarium.I had heard that too. Those things apparently can go off like bombs. I'll scrub it really well. Would soaking it in alcohol or bleach be good too?
If you really want to make a rock explode, heat it up as much as you can, say in the center of a campfire, and throw it in a cold lake..... KABOOM...SPLOOSH!
I believe you're fine if you place the rock in room temp water and bring them both up to a boil. It's the rapid heating/cooling of the outside of the rock that 'splodes it.