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Old 01-26-2003, 10:14 PM   #1
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Coraline?

I am familiar with cyano, this is not cyano as it is encrusting the rock.

It is a beautiful midnight purple color. almost velvety looking. It is spreading rather rapidly, would this be a different type of coraline?
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Old 01-26-2003, 10:17 PM   #2
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No, I'm unsure what type it is, but coralline is calcerous and doesn't look velvety. It is also difficult to scrape off the rocks. I had some identical to the way you descripe and it came off fairly easily with a toothbrush and a little elbow grease. Still don't know what it is, but it wasn't coralline.
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Old 01-26-2003, 11:21 PM   #3
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When it grows how does it grow?

Coraline usually starts as a speck on the glass (thats where you notice it growing easiets) and then it grows out from there getting larger and larger diamater.
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Old 01-27-2003, 12:05 AM   #4
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Quote:
Coraline usually starts as a speck on the glass (thats where you notice it growing easiets) and then it grows out from there getting larger and larger diamater.
Mine has never had a chance to land on the glass as I scrape every day. It starts as a speck on the rock and then grows out. It is encrusted. A few places have like pinholes in them.
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Old 01-27-2003, 09:44 PM   #5
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Hara - there is a type of coralline which is a very dark red (Maroon Coralline) - the species is Peyssonnelia sp. We have some in our tank, and although it is very hard (like normal coralline), it does have a velvet-like appearance.

Here's some info. on it from John Rice's gallery - is this it?

Maroon Coralline (Peyssonnelia sp.)

HTH,
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Old 01-27-2003, 09:57 PM   #6
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I got some of that in my 20 gallon. So is it ok?
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Old 01-27-2003, 10:03 PM   #7
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I got some of that in my 20 gallon. So is it ok?
Yep! Just another type of coralline. Nothing harmful at all.
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Old 01-27-2003, 10:05 PM   #8
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seems to grow well in very low light.
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Old 01-27-2003, 10:07 PM   #9
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I have some of that...but it wasn't what I was referring to...the stuff I was talking about looks like a deep wine colored velvet, like a really thick turf algae.

Here is a pic of my maroon coralline..
http://www.reefrunner.netfirms.com/i...peppermint.jpg
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Old 01-27-2003, 10:12 PM   #10
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a photo is the best, but you decribed it ok to me. it is a type of cynao bact. i can't remember the name that my lfs told me. poss high phos/silica. you can pick it up if it gets thick enough. my recemendation is to turn up your skimming to the max and check your posh/silica level. i got rid of mine in 1 week. in just 2 days it should start getting brown. 8)
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