The Planted Tank Forum - View Single Post - Knuggs 29G Community tank
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post #14 of (permalink) Old 04-22-2007, 03:40 AM
Algae Grower
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Join Date: Jun 2005
Location: Nashville Area
Posts: 132
I may be totally off base, but as a kid I spent many a day in the creeks(or cricks...depending on what part of the world you're from) and rock piles here in TN and I found pieces like that here too. Its fossilized coral. I have no idea its effect upon aquarium water, but your tank looks good. I was big into dinosaurs and fossils as a kid, still love to see the newly discovered bones of the past. me know if I'm wrong about the fossil.
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