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Old 03-31-2010, 12:45 PM   #1
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Red Spot on my Liverock

Hello guys! Last night I saw these things on my live rock. My tank is still cycling for 2 weeks now and it just suffered to GHA attack last week. I tried to do a search for this things in the internet and didn't got any satisfying answer. The spot is kinda reddish to purplish color its not slimy at all nor hairy like the GHA. I'm not sure if this is a red algae. I got concerned with the GHA minor outbreak and I might go nuts if an algae outbreak will occur again but what can I do but to work on it right?

I need all the advice I could get... Thank you!

Here is some of the photos to help the identification:
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Old 03-31-2010, 12:47 PM   #2
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Whats GHA?
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Old 03-31-2010, 12:53 PM   #3
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Whats GHA?
Uhm... Green Hair Algae...
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Old 03-31-2010, 01:06 PM   #4
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Check the phosphate level of the water source you're using. Hair algae loves that stuff I believe.
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Old 03-31-2010, 01:14 PM   #5
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Check the phosphate level of the water source you're using. Hair algae loves that stuff I believe.
Thank you, I will and also I was trying to identify the red spot on my live rock, I don't know what it is.
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Old 03-31-2010, 01:14 PM   #6
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Me too neither.
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Old 03-31-2010, 02:34 PM   #7
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In the 1st pic, the deep purple colored spots near the bottom left look like cyanobacteria. It's very common in a new, cycling system. And if it recently showed up I would rule out coralline algae just because your water is too unstable to grow it at this point.
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Old 03-31-2010, 02:49 PM   #8
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In the 1st pic, the deep purple colored spots near the bottom left look like cyanobacteria. It's very common in a new, cycling system. And if it recently showed up I would rule out coralline algae just because your water is too unstable to grow it at this point.
Thank you for the info! Is it harmful? If it is, what should I need to do? Is it going to go away by itself?

Thanks, again!
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Old 03-31-2010, 02:52 PM   #9
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We have an article here at AA just for you!

Cyanobacteria, AKA Red Slime Algae
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Old 03-31-2010, 03:05 PM   #10
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Also as far as the GHA read this checklist.

FantasyReef Databases-Viewing item "10 Step Plan for Nuisance Algae Control"
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