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Old 07-17-2009, 11:00 PM   #1
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Grey Algae?

I just changed from maxi jets (a 1200 a 900 and a 400) To 2 koralia 3's the tank seems to have a lot more flow but it looks like I have grey algae on one of my live rocks that was purple. is this just stuffed that was kicked up by the extra flow or something I should worry about. The tank is 6 months old and has had no other changes. It does not look like the diatom bloom I had after my tank cycled that was brown. This is grey.
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Old 07-20-2009, 11:24 AM   #2
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Hmmm, can you post a pic?
Is it possible that it is coreline that is starting to bleach??
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Old 07-21-2009, 02:30 AM   #3
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I'll try to get a pic It might be too small for a pic but it is all over 1 rock. It waves with the flow like green algae. It is not hard like coraline. It showed up after I moved my rock around.....no reason to move, just playing god. It looks like green hair over my very purple coraline.
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Old 07-21-2009, 03:11 AM   #4
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i have same stuff all over rocks - looks gray and waves around

seems to catch sand when it blows around
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Old 07-21-2009, 10:41 AM   #5
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So is it green or grey?
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Old 07-21-2009, 11:22 AM   #6
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grey. not even a hint of green. It's structure is like the green in my tank only the grey is tiny.
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Old 07-22-2009, 01:52 AM   #7
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exact as mine - rock is very furry and algae is totally grey
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Old 07-24-2009, 09:13 AM   #8
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Thanks for the input but I just got mu t5ho's and the algae is definately green.
It is amazing what proper lighting does for a tank
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