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Old 07-04-2011, 12:30 PM
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Steve'o Steve'o is offline
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Default Live Rock has big black spot??

One of my Live rocks has a portion the size of a toonie that has turned from purple to black??? What could this be and should I be concerned?
If so how to get rid of the black and not damage the nice rock?
Thanks all,
Steve'o
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Old 07-04-2011, 02:38 PM
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Default

Sponge possibly? Have a look below.

http://www.reefcentral.com/forums/sh....php?t=1140423

Post a pic if you can, will make it much easier.
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