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Old 01-02-2006, 01:44 AM   #1
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Algae bloom

I have all these red algae all over my 20gal tank it has been set up almost a month now. My parameters are as follow:

PH - 8.2
Nitrate - 15
Nitrite - 0.0
Ammonia - 0.0
Phosphate - 0.0
Calcium - 420

I use de-ionised water and distilled water which I bought at supermarket any problem with that? I need to cure this problem before it becoming worse. Please help...
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Old 01-02-2006, 01:53 AM   #2
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that looks like cyno to me, how much flow do u have in your tank? plus u might want to check the phosphate levels in the water u are using.oh yeah and it will get worse if u don't find whats causing it, what do u have for a bioload in your tank. how long do you leave your lights on?
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Old 01-02-2006, 01:54 AM   #3
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Sorry to provide more infos my lights are 2 power compact 40w + 40w total 80w on 10 hours a day. Is this too much? Salinity 1.024 Thanks for your helps in advance.
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Old 01-02-2006, 01:57 AM   #4
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My phosphate level is undetectable that's why I am curious how it get so bad. Could Nitrate at 15 alone causing this? Lights run 10 hours a day.
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Old 01-02-2006, 01:59 AM   #5
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no that is all fine, are u over feeding your tank or using any additive's?
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Old 01-02-2006, 02:37 AM   #6
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Yes I am using the Red Sea Calcium addictive. It also contains Strontium, Molybdenum & Iodine. I have also got 10 hermit crabs and a sand shifting star in the 20gal is that too much?
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Old 01-02-2006, 09:02 AM   #7
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How often are you feeding?
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Old 01-02-2006, 12:08 PM   #8
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The better question is...what is the phosphate level of your top-off water? The cyano can be using up the phosphate just as fast as you introduce it.

Test the water that you use for top off and mixing water.
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Old 01-02-2006, 02:24 PM   #9
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Ok first problem I see is SG should be at 1.026 if this is a reef tank.

I agree check the water that your using for changes and top off.

Good flow where the cyano is will get rid of it. You should have at least 300gph in flow..

You have a tds meter?>
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Old 01-02-2006, 08:09 PM   #10
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Ok back to the original question . How much are you feeding.? this is an important because overfeeding is putting alot of DOC in the water that with nitrates is feeding the algea. Phosphates is not the only fuel for algea. Both questions were important. Not just the phosphate one. I would say that more times the overfeeding is the problem.
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