The Planted Tank Forum - View Single Post - Jake's 18"/3gal Nano Shrimp Tanks
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Old 10-08-2012, 04:39 PM   #191
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Some has montmorillonite flecks in it and some doesn't, it seems. Much more visible in the finer grain.

Some of the older Shrimp Sand didn't contain it and it's possible you have some old product.
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