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Old 04-21-2003, 04:24 PM   #1
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brown stuff

Im getting this brownish yellowish film on everything in my tank, mostly the glass, what could it be? is it dangerous for my fish? help.
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Old 04-21-2003, 07:19 PM   #2
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Do you have a picture of it?

Just by description, it sounds as if your tank is going through Diatom growth...possibly cycling? How lond has the tank been up and operational?

If it is diatom growth, blueleg hermits and turbo snails love it...

If the tank is fairly new, you should be happy to see that IMO because it is almost done or at the end of the cycling period..
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Old 04-21-2003, 09:57 PM   #3
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Thanks

It is a fairly new tank, about 3 months as a marine tank converted from a brackish tank for about half a year. It just started recently and spread very quick, will it go away??
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Old 04-21-2003, 11:20 PM   #4
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yeah it is part of the cycle this means that your amonia is going up. they will eventually go away as the tank matures.
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Old 04-22-2003, 11:42 AM   #5
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something_fishy,

What type of water are you using - tap or RO/DI? Do you have a test kit for silica? Diatoms typically thrive on silica, and while common in a newly set up system, will also thrive long-term in water which contains elevated silica levels.

The good news is, when you see the brown dusting - what you are seeing is the dead skeleton of the diatoms - so, unless you have silica in your water to fuel further growth, they're probably on their way out.

HTH,
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Old 04-22-2003, 12:30 PM   #6
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Quote:
Do you have a test kit for silica
Quote:
Diatoms typically thrive on silica
Forgive my anal retentativness, but silica=glass, silicate = diatom food. I hate to point it out, cause it is so picky, but it came up in another post this morning and I wanted to avoid confusion. Silicate requires a hydrogen molecule as well as a metal, silica does not, I suspect it is the metal that fuels the algae growth.
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Old 04-22-2003, 12:35 PM   #7
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Sorry, Kevin - color me not a chemist!
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Old 04-22-2003, 12:39 PM   #8
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Also, when diatoms start growing, the ammonia content is diminishing. Usually the Nitrite process is in full swing and either high or dropping. At 3 months, I am hoping that your ammonia levels are 0 or very close to it...
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Old 04-22-2003, 12:52 PM   #9
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WOW

Great response to my question guys. Thanks a lot. I went ahead and cleaned the glass on the inside and took out any ornaments that I found were just collecting brown stuff. The ammonia is 0 and the nitrites and nitrates are practically 0, it seems to have been dropping for the past few weeks. So, what your all saying seems to be true. Thanks a lot. Oh, by the way, I can't seem to post any pictures any more. It says I have passed my 1 mb limit??
I haven't posted any pics in a few months??
I would have shown a pic of the "brown stuff", but I cant?
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Old 04-22-2003, 01:27 PM   #10
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http://www.aquariumadvice.com/profil...wprofile&u=391

If you will go and view your profile, you will see in the bottom right corner a box that shows the percentage of your quota you have used for uploads. A couple of months ago, we instituted a 1mb limit to uploads, you have uploaded 333% of your 1mb quota, or 3.33 MB. Under the status box, there is a link to your "User Attachment Control Panel", if you click that link, you will see all the attatchments you have made and from there you may delete some of them. This will free up some space for future uploads. Another option is to upload to the gallery (you have another mb of space allotted there) and link to the pic using the img tags. A third option is to get more space in both the gallery and the attatchments, by becoming an Aquarium Advice Alumni member.
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