Help identify rock - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 02-12-2019, 05:08 PM Thread Starter
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Help identify rock

Hi can u help identify this rock found at local reservoir South Wales.

Is it pumice?
Aquarium safe?
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post #2 of 5 (permalink) Old 02-12-2019, 05:29 PM
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I believe this is scoria, which is similar to pumice except scoria has larger vesicles. Should be aquarium safe.

https://en.wikipedia.org/wiki/Scoria
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post #3 of 5 (permalink) Old 02-12-2019, 05:38 PM Thread Starter
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Thanks buddy
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post #4 of 5 (permalink) Old 02-12-2019, 05:45 PM
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Agree; looks like volcanic cinder.

To double check, drip some acid on it. Vinegar will work if you've nothing stronger. No bubbling means no carbonate present and should be okay.
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post #5 of 5 (permalink) Old 02-12-2019, 07:01 PM Thread Starter
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Awesome how does something like this get here?
No volcanoes in south wales used to be some in North Wales.
Does that mean these rocks were put there? Or been there for a long time?
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