The first rock looks better!Nice texture, pity it's not inert. [sure about that?]


The first rock looks better!Nice texture, pity it's not inert. [sure about that?]
You can if you dare to fail - Stan Chung

I did not in fact do the vinegar test. but when i remove it, my pH stabilized at 6.8-7. with the rock, it fluctuated from 6.8-8.
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