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Old 04-01-2014, 09:33 PM   #1
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Weird stuff on sand bottom

I have had my reef tank up for about 5 months now and all of a sudden i am getting brown debris and a wierd purplish web-like subsatnce of the sand... all my parameters are where they should be! Also a brown algea substance is growing on my rocks!!!! Please help!Click image for larger version

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Old 04-02-2014, 12:20 AM   #2
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Looks like some type of Algae. Whats your phosphates at?
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Old 04-02-2014, 07:47 AM   #3
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I had something similar could be the same thing red slime algae took a month to clear it, I sucked it up with gravel cleaner comes back pretty quick though but will go eventually, caused by high nitrate levelsClick image for larger version

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Old 04-02-2014, 07:50 AM   #4
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It's an algae bloom. I had the same thing after sever months of being set up. Do PWC's and cut back on your lighting.
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Old 04-02-2014, 08:44 AM   #5
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Weird stuff on sand bottom

Well, the pictures have a lot of noise, so it's kind of hard to tell. From your description it sounds like you have:
1. A diatom bloom
2. Red Slime/ Cyanobacteria
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Old 04-02-2014, 02:22 PM   #6
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Ok thank you
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Old 04-02-2014, 02:26 PM   #7
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I believe red slime algae is not only a phosphate issue, but a flow issue. We need some more information to help you. How much flow do you have?
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Old 04-02-2014, 06:54 PM   #8
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I dont think that it is red slime... its not redish its purple looking and not bright
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Old 04-02-2014, 06:59 PM   #9
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Slime can be purplish as well. Can it scrape off the rocks? If it comes off easily then its cyano, red slime.

What type of water do you use for water changes?
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Old 04-02-2014, 07:33 PM   #10
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Well sadly i had no clue about the dangers of tap water... well i used tap for a while and about a week ago something went wrong and the tank "crashed"... i lost all my coral and two tangs! Now i use RO/DI water!!! And its just on the sand!!! Not on the rocks at all
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