The Planted Tank Forum - View Single Post - Does your black diamond have that needle like pieces?
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post #8 of (permalink) Old 10-21-2012, 01:30 AM Thread Starter
Planted Tank Obsessed
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Join Date: Jun 2009
Location: Atlanta, GA
Posts: 429
Hmmm, yours must be 30/60 grit. Mine is 20/40 and has much more of those "needles" and they are thin... Still feels OK in my palm but I did poke my finger once when I squeezed hard.

Originally Posted by Monster Fish View Post
They look like this:

I picked out whatever I could find but eventually I was like, "to hell with it!" and just left them mixed in the sand.
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