Rock OK?? - The Planted Tank Forum
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post #1 of 3 (permalink) Old 03-29-2010, 10:11 PM Thread Starter
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Rock OK??

On another thread, a member suggested I post a picture of the rock I am unsure of. This rock is typical of my area and I was curious if it would be safe for my tank. Just so you know, I have'nt done the acid/vinigar test yet. Just hoping one of you rock hounds out there could ID it for me and let me know if it's ok. Here it is:
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Let me know. Thanks
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post #2 of 3 (permalink) Old 03-29-2010, 11:48 PM
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are those shiney falkes mica or pyrite.

GEOLOGY Rocks Have A Gneiss Day
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post #3 of 3 (permalink) Old 03-30-2010, 07:43 AM
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The best way to tell is to do a fizz test. You can do it with vinegar but best way is to use a muriatic acid, vinegar is not as strong. Put a little bit on the rock and if it doesn't fizz it's safe if it fizzes I wouldn't put it in the tank because it can change your water chemistry.

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