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Old 03-22-2014, 06:35 PM   #1
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Strange growth on my live rock

Hello,
I purchased some live rock a few days ago. Yesterday I discovered I have tons of mini brittle stars, along with some type of transparent gray or white slime looking stuff.. Can anyone identify what this could be? Is it harmful or good and how do I get rid of it?

My water perameters are perfect except my nitrates are a little high but that's due to disturbing the sand and also changing some things in the sump.
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Old 03-24-2014, 07:32 PM   #2
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Strange growth on my live rock

I can't really see it. Can you get a better pic?
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Old 03-24-2014, 07:45 PM   #3
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I see what look to be a couple of sponges,which would be fine.
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Old 03-24-2014, 08:10 PM   #4
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Yeah most likely sponges, harmless.
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Old 03-24-2014, 08:47 PM   #5
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Strange growth on live rock

The growth is right there by the butterfly fish. Can it harm anything in my tank? There was a cleaner snail attached to this growth and it looks like it died.
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Old 03-24-2014, 08:48 PM   #6
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Just sponges, absolutely harmless. I just got some too. Snail probably starved or something.
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Old 03-24-2014, 09:14 PM   #7
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Whew! What a relief. The snail was stuck to it and it died so I assumed it killed the snail. Is it a possibility the snail was sick before I added him to the tank? He only lived about 2 days. I'm new to having a salt water tank so I always have questions, especially when seeing new things in the tank

Discovered we have mini brittle stars living in that live rock too. But they never come out to eat, they just stick their arms out hoping to catch food. Will they ever come out?
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Old 03-24-2014, 09:20 PM   #8
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Strange growth on my live rock

Yeah, it's a possibility. Invertebrates are more sensitive to changing temps and PH then fish.

I wouldn't worry about the brittles.
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Old 03-24-2014, 09:28 PM   #9
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Does anyone happen to know what type of sponge this might be? I've been searching the internet for any info and I can't find anything that looks like this sponge, if it is a sponge.

My tank is also super high in nitrate right now. Tests showed as 8.0 in Ph, 0.25 for nitrite, and the ammonia is 0.
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Old 03-24-2014, 09:29 PM   #10
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You're never going to be able to really Id it down to a genus let alone a species. Sponges look so similar it is very difficult if not impossible to id them without a microscope.
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