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Old 05-21-2011, 11:05 PM   #1
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Brown algae mat

I keep having brown algae growing on my sand if left long enough it becomes a mat like algae What could be causing this? my water parameters check fine and the tank has been up for over three months I would think I would be through the diatoms stage??
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Old 05-22-2011, 12:18 AM   #2
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It sounds like diatom. I think every new tank will get them eventually. I thought I got lucky but they're growing on my rock right now. It'll eventually die off unlike other algae. If you want to fix it you can do the following:

1. cut back on feeding
2. cut back on lighting. If you dont have coral, leave it off for like 3 days and it'll help a lot
3. PWC will lower the nutrients needed by the algae to grow

If you can post a picture, we can confirm if its diatom or not
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Old 05-22-2011, 10:32 AM   #3
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this is some pics
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Old 05-22-2011, 10:40 AM   #4
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Great advice Henry. I agree if you don't have any corals leave you're lights off for a few days that will help along with the PWC's. And maybe if you cut back feed'n you're fish to every other day if thats not what you are do'n already. I remember I had that problem early on when I first started And I did exactally what is stated above and the problem went away. Good luck.
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Old 05-22-2011, 10:44 AM   #5
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How much part will the lights play in this? I have coral and cant just shut my lights off I am doing 5 gallon pwc a week on a 90 gallon with a 29 gallon sump Is this enough or should I up that? I do feed everyday but small amounts so cutting back on feeding is something I can do
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Old 05-22-2011, 11:01 AM   #6
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on a 90 gal I would do at the very least 15 gal PWC and the light situation is tough with the coral. I suggest maybe leave'n em on for 5 to 6 hours at the most for a few days and see how that works out. I didn't have corals when I had that problem so I'm guess'n by have'n em on for just those few hours a day may effect the amout of time it will take to end the problem. It may take a little longer but I think it will still work.
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Old 05-23-2011, 08:31 PM   #7
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If you have corals, research around to see how many hours is recommended for each and leave your light on only enough too keep your coral happy.
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Old 05-23-2011, 08:59 PM   #8
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I've read just cut back on the whites leave atincs alone... i got a orange spotted goby.. cleaned my sand bed like no tomorrow... also get some chestnut turbid they did a great job on rocks..
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Old 05-23-2011, 09:42 PM   #9
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chestnut turbid??? A orange spot goby is actually in my plans for my next purchase
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Old 05-23-2011, 10:54 PM   #10
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Lol chestnut turbo. Dumb smart phone..
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