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Old 03-05-2009, 12:13 AM   #1
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Question what is this!?

Hello everyone! I'm new here~ this looks like a really great site, I'm glad I found you all : )
I bought a live rock today and there's something really weird (to me) on it.
I took a picture of it- would you like to see it? ; )
It looks like a shiny black marble~

Thank you!
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Old 03-05-2009, 02:10 AM   #2
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I agree... it looks like a shiny black marble!

Going to need a bigger picture to really give you any help. Or at least from a different angle or something. Standard questions.... is it soft or hard? Does it retract at all if you touch it? Any change between lights off and on?

Oh... and welcome to AquariumAdvice!
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Old 03-05-2009, 06:21 AM   #3
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im going to say bubble algae

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Old 03-05-2009, 06:29 AM   #4
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I'd say Valonia, bubble algae. Most people reccomend removal as it can spread like wildfire. Be careful though, to remove it, make sure you get right underneath it with a knife and flick it off without bursting it. It's believed that bursting it helps it to spread. Best to do it outside the tank, then if it bursts (jelly stuff everywhere), you could just rinse the rock in tank water, but over the sink.

On the other hand I had some in my 50g tank for about 9 months and never spread off the rock it was on. I quite liked the look of it.

Mithrax crabs eat them apparently.

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Old 03-05-2009, 12:07 PM   #5
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I researched the Valonia, bubble algae- and found it almost positive that's what it is.
Thank you all so much! I would've been searching forever without your help : )
I'll see you all on the boards...
Sharonar22
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Old 03-05-2009, 01:55 PM   #6
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yep bubble..just pick it out
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Old 03-05-2009, 04:35 PM   #7
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'Bubble' Alage: Selected Descriptions, Controls and Comments by Horge Cortes-Jorge, Jr. - Reefkeeping.com
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Old 03-05-2009, 05:18 PM   #8
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Try and wiggle it a little to remove it from the rock. Try very hard not to pop it while it is in the water. It will release spors and spread.
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Old 03-06-2009, 08:48 PM   #9
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Kurt

I forgot to give you another pic!
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Old 03-07-2009, 02:13 PM   #10
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I'm about 100% sure that is bubble algae. Try very hard not to pop it when you remove it from the tank.
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