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Old 01-12-2013, 07:21 AM   #9
DarkCobra
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If none of these options are cheap enough, I vaguely recall seeing one other option discussed years ago.

Black Diamond sandblasting media. Basically coal slag fired to glass. Aquarium safe. It's designed to be abrasive, so keep that in mind if you intend to keep cories or other fish with barbels.
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