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Old 04-01-2013, 04:06 PM   #1
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Safe to put in the tank?!

I sure hope so! Found this beauty in my backyard opinions, please!
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Old 04-01-2013, 04:11 PM   #2
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That's really nice! Is that rock or a piece of metal lol... Not sure you can easily get it appraised here, maybe bring it to a rock specialist?
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Old 04-01-2013, 04:15 PM   #3
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That's really nice! Is that rock or a piece of metal lol... Not sure you can easily get it appraised here, maybe bring it to a rock specialist?
It's a rock, ill probably give it the ol' vinegar test after work
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Old 04-01-2013, 04:17 PM   #4
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It's a rock, ill probably give it the ol' vinegar test after work
Well the vinegar test is for calcite. It doesn't show if it's safe or not, just if it will harden you're water and raise the pH.
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Old 04-01-2013, 04:19 PM   #5
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Well the vinegar test is for calcite. It doesn't show if it's safe or not, just if it will harden you're water and raise the pH.
Ughhh, I wanna check for metal, I'm not concerned about hardness or ph, I run buffers as it is to raise them.
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Old 04-01-2013, 04:20 PM   #6
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Is that obsidian? If it is it should be safe. Obsidian is essentially a glass.
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Old 04-01-2013, 04:20 PM   #7
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That appears to be a piece of obsidian and/or slag. Either of those would be completely safe to put in the tank, as they are both effectively glass(that's exactly what slag is).
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Old 04-01-2013, 04:22 PM   #8
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That appears to be a piece of obsidian and/or slag. Either of those would be completely safe to put in the tank, as they are both effectively glass(that's exactly what slag is).
Perfect! Thanks! I was gonna say it reminded me alot of some slag I used as a substrate awhile back
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