11-14-2011, 09:23 AM
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Wash them good and you'd be fine - ultra conservative, drop in a pot of boiling water for 5 minutes.
On the other hand, sea shells and coral really don't belong in a freshwater tank as they wouldn't be found in any freshwater rivers, streams, ponds and such. It's a matter of preference really. I quite like the natural look as though it was a window into the amazon river, a lake or a pond....natural gravel, stone, wood, plants. The setups with dayglo gravel, carnival rides, skulls, little castles and such.... just don't do it for me. Each to his/her own.
However, if you want shells, it is your tank...but when I stop by, I'll remind you that sea creatures don't live in freshwater