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Thread: Black Sponge?

  1. Sat, 9th Feb 2013, 10:21 PM #1
    electricrcplane
    electricrcplane is offline Web Member
    Join Date
    03-12-2009
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    San Antonio, TX
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    456

    Default Black Sponge?

    ImageUploadedByTapatalk1360465134.132711.jpg
    Has anyone ever seen this stuff? It is quite hard when in the tank and even after it dries is hard to get off rock. I had some on a rock and dried the rock out a while back. Haven't seen it anywhere else just wondering if anyone knows anything about it.
    125 Gallon mixed reef 8 gallon nano
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  2. Sat, 9th Feb 2013, 10:31 PM #2
    grouch
    grouch is offline Web Member
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    05-11-2010
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    Default

    I've had that when exposed to the light mine turns red.
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