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Old 12-22-2007, 07:04 AM
TLM TLM is offline
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Default Need help identifying algae

Need help to identifying the brown algae in the picture. It is growing quite fast. It is on few pieces of my live rock. And it is covering some of my green star polyps causes them not to open up. Should I just pull them off? What type of tang will eat them? Please help! Thanks!
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Last edited by TLM; 12-22-2007 at 07:11 AM.
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Old 12-22-2007, 07:22 AM
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It is hard to tell from the picture, but I think that's hydroids. If they are spreading, you might want to dose them with boiling water, vinegar, kalk, joe's juice, or something. They might sting you if you try to pick them off by hand. They'll likely cycle out, though. They don't tend to be stable.
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Old 12-22-2007, 07:52 AM
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Hydroids. Not algae.
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Old 12-22-2007, 04:02 PM
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Definitely hydroids, get out your hammer and chisel.
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Old 12-22-2007, 07:21 PM
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So what should I do? Pull them all out then?
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Old 12-22-2007, 10:09 PM
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If you can.. or cover them with epoxy, although I've heard they can just work their way around that. They can spread and they burrow deep into your rock so getting rid of them is not as easy as you'd think. They seem harmless but .. yeah, as you've noticed, they're not completely benign either.
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