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Old 04-20-2004, 05:33 PM   #1
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Newbie What is this?

Two thing on this piece of rock? Any ideas?
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Old 04-20-2004, 05:35 PM   #2
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Feather duster worm, a filter feeder, harmless critter. 8)
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Old 04-20-2004, 05:35 PM   #3
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The white thing --- small crowned tubeworm - aka mini "feather duster".

Green bubbly stuff is Valonia - nusiance macro algae.

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Old 04-20-2004, 05:38 PM   #4
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Should I be concerned about the Valonia? I have certain areas with it on the rock
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Old 04-20-2004, 05:48 PM   #5
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Sometimes it stays on one spot, and really isn't cause for concern. Other times, it will spread fairly rapidly, and might begin to over-take the rocks. Personally, after having fought a few nasty battles with this stuff, I'd get it out while it's in small areas only.

If you have some kalk powder, make a thick paste with a little hot water, and put some paste on top of the algae. Cover this with an inverted clam shell (oyster, scallop, whatever - even a slice of pvc) to deprive it of light. Leave it like this for about a week. This should kill the valonia.

Don't try to scrape it off the rock - if you burst the 'bubbles', there are spores inside which will be released.

Some people use Emerald crabs to keep it in check, personally, I don't think that's the best option. JMO
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Old 04-20-2004, 06:40 PM   #6
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Will the kalk powder also work for the red bubbles??? I havent thought about trying that yet and scarlets wont touch them
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Old 04-20-2004, 06:50 PM   #7
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Not sure what the red bubbles are -- if you mean cyanobacteria, probably not.
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