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Old 04-30-2004, 04:51 PM   #1
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What is this black gunk on my LR?

This is what we use to forum for, RIGHT? HELP! Please... I don't know what this stuff is. My tank (90gal) has been up and running 2 weeks now. It is still cycling, no fish or inverts... This black gunk looked like a form of macro algae at one time. I've been trying to scrub it off the rock, to no avail. What am I to do with it. Leave it grow or remove the rock and scrub it off? Other suggestions?

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Old 04-30-2004, 06:52 PM   #2
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I would leave it and see what happens...
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Old 05-03-2004, 08:04 PM   #3
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i think it might be dying sponge. if it stinks really bad thats what it is.
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Old 05-06-2004, 09:18 PM   #4
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it looks like an encrusting type of sponge to me. I have a large piece of rock that started with a small patch about the size of a silver dolllar, it is now about as big as an apple. it is flat, black and grows slowly.. no harm, it is actually very attractive to me and it is a filter type feeder..
" Get busy livin', or get busy dyin' "
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