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Can I use this rock in my tank?

2K views 18 replies 4 participants last post by  Calmwaters 
#1 ·
It's actually going to be a turtle tank, not sure if that matters.

I found it in my garage. I'm not sure what it is made out of. It has those little eye catching "gems" in it, probably plastic. When I poured boiling water of it some of the things on top sizzled and popped.
 

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#4 ·
To me it looks like glass and not rock. I know with rocks you can test them by putting vinegar on them but glass I am not sure.
 
#6 ·
Does it have any sharp edges at all? I would maybe post in the turtle section on here and see if anybody there know if it would be okay. I am not sure how delicate turtles are. LOL
 
#8 ·
I'm thinking that the popping noises I heard was the glass cracking when I poured the boiling water over it. I already checked to ensure that the edges weren't sharp. I'm curious about the "gem" things on the top of it. I wonder if those would have any affect on my water or my turtles well being. I'm guessing that they're either just glass or plastic.
 
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