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Old 04-28-2012, 06:15 PM   #1
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my sand just started getting this stuff on it

Here are some pics . . . .my sand just started getting this stuff on it. I am using an ro system . . . I believe I was over-feeding. . . Cut back about a week ago. Someone told me phosphates. . . I purchased a brown power that is supposed to remove phosphate, but now about 5 days later . . Still there. Any suggestions?

Thank u
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Old 04-28-2012, 07:40 PM   #2
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Looking on my phone and I cannot see for sure, but it looks like cyanobacteria. If it is even if you starve it of nutrients you still have to manually remove it.
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Old 04-28-2012, 07:59 PM   #3
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It looks like brown diatoms to me, very common in a new tank. Is this a new setup?
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Old 04-28-2012, 08:30 PM   #4
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+1 to Diatoms
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Old 04-28-2012, 08:46 PM   #5
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I think diatoms too. Be patient, it will pass.
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Old 04-28-2012, 08:56 PM   #6
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Holy cow thats a massive diatom bloom. Have you always used RODI water? It will pass in a few weeks to a month, but I'm guessing ya may as well read up on cyanobacteira so ya know what to do. Your tank will go through a few pesky algae blooms, just be ready for them so they don't get out of control.
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Old 04-28-2012, 11:49 PM   #7
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Tank has been set up about 2 years. . . Have always had an rodi system. . . I just did change the filters and di mix about 2 weeks ago. Which is normal routine. I couldnt count the number of times I have done that.
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Old 04-29-2012, 12:08 AM   #8
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I figured it out ! Appearently DI has a shelf life. . . I bought a bag 4 months ago & only used half. . . Then a week or so ago I changed all the filters and DI . I have a built in tds meter on my system. I checked it and it reads 48 out. . . The DI is already needing to be replaced.

Anyone know the shelf life of DI?
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Old 04-29-2012, 02:20 AM   #9
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Quote:
Originally Posted by 200 gallon reef
I figured it out ! Appearently DI has a shelf life. . . I bought a bag 4 months ago & only used half. . . Then a week or so ago I changed all the filters and DI . I have a built in tds meter on my system. I checked it and it reads 48 out. . . The DI is already needing to be replaced.

Anyone know the shelf life of DI?
6 months. Generally. Depends on how much water you make.
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Old 04-29-2012, 05:45 AM   #10
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Wow, good testament to the value of quality RO/DI water!

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