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Old 03-24-2010, 05:31 AM   #1
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Brown Algae taking over live rock

My 10 gallon tank has about 10lbs of live rock that has gotten covered in brown algae over the last several days. I did have purple and light brown and it is either disappearing or being completely covered. I have put several snails in to help, a emerald crab, and some hermits. If I scrub some of the live rock will I being scrubbing of what makes it "live". Also the light is basically only off at night. So I have turned that off as well during the day. Any thoughts, suggestions. I don't want to damage the bacteria on the live rock.

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Old 03-24-2010, 06:54 AM   #2
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How old is the tank? Could be diatoms which are normal and will dissappear almost as fast as it showed up.


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Old 03-24-2010, 08:32 AM   #3
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is the brown stuff almost like rust? does it easily come off? If so, probably diatoms

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Old 03-24-2010, 09:52 AM   #4
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I agree, it's probably diatoms and trying to "cure" it would do more harm. IME, it's just one of many "phases" that a new tank goes through.
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Old 03-24-2010, 07:19 PM   #5
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Ah ha, I'm glad I read this thread. Answers my brown/rust live rock problem. I didn't try to rub it off but I did touch it to see if it was slimy but it wasn't.
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Old 05-03-2010, 07:19 PM   #6
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i had the same problem the diatoms just went away one day
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Old 05-03-2010, 07:26 PM   #7
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yeah its just diatoms it won't take long to go away maybe only a couple of days just one of many phases a new tank goes through

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