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Old 11-14-2010, 08:13 PM   #1
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Used tank with colored spots in silicone...

Picked up a used 29 gallon today. It looked like it just needed a good cleaning on first inspection but upon getting it home I see there are some colored "mold-ish" looking spots along the seals, many of which appear to be somewhat brightly colored and a few are almost purple. They seem to be under the silicone although the seal itself does appear to be largely intact. Any ideas on what this could be?

Update: Figured it out with some help from the chatroom. Thanks guys!
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Old 11-20-2010, 03:41 PM   #2
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Looks like it was used for saltwater.
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red spots, silicone, tan

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