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Old 01-02-2015, 01:58 PM   #1
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Brown algae----need help

I have developed brown algae, and is quick growing. 72 gal bow front, sump setup with live rock and sand operating around 9 months. Two lawnmower blennies,hippo tang, foxface, and clarki. I also have 2 emerald crabs, two hermit crabs, and on very small star. I did a 10 gal water change last week, today I'm dong 5 gal change.


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Old 01-02-2015, 02:00 PM   #2
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Old 01-02-2015, 02:07 PM   #3
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What you are seeing is pointing to parameter issues. How often are you feeding and how much? How often are your water changes? The water changes that you listed just aren't really large enough to be keeping up with the slowly building up nitrates over time, probably leading to what you have on your hands now. I would suggest larger water changes with ro/di water and cut back feeding if possible. During these water changes, I would siphon out as much of this build up as possible.
To understand how water changes lowers nitrates, for example, if your nitrates are at 40 and you do a 50% water change, you will still be left with 20. Thats why sometimes when parameters get out of control one must do several large water changes to get things back under control. Even when you do the water changes, you still feed your fish and they still poop which continues the process of your nitrates rising.
BTW, is it slimy?
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Old 01-02-2015, 02:25 PM   #4
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Not really I would say its like fur.


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Old 01-02-2015, 02:27 PM   #5
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Also nitrate is about 3ppm


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Old 01-02-2015, 02:43 PM   #6
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Brown algae----need help

Quote:
Originally Posted by Sniperhank View Post
What you are seeing is pointing to parameter issues. How often are you feeding and how much? How often are your water changes?

?? And with that much of an outbreak you'll be getting false numbers on your tests


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Old 01-02-2015, 02:52 PM   #7
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Like Bigred said, you won't get an accurate reading on your parameters. I'd suggest large water changes with ro/di water, cut back on feeding, siphoning out any algae if possible. Algae battles are usually long and drawn out. There are two articles in my signature that help address algae issues in the aquarium. You may also have to pull the rock out to scrub it off, which you could do in old tank water from your water changes.
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Old 01-02-2015, 06:07 PM   #8
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I have cut back on feeding, as much as I can. I am using ro/ di should I test to water for nitrates? I started preparing water for large change. 20 gal? On a 72 gal tank.


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Old 01-03-2015, 09:51 AM   #9
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I have run both salifert and API nitrate test, both pint to 2ppm phosphate test I believe to be high I am going to get hi 713 to test. I have a big cleanup ahead back walls and rock to clean. Any hints?


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Old 01-03-2015, 10:48 AM   #10
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How much have you cut back on feeding? What is your typical feeding regimen?
I feed a tank I maintain 2 times a week and none of the fish are thin or malnourished. Feeding consists of 1 whole sheet of nori and what would equal about 2 cubes of frozen food (I make my own frozen food). This tank has 2 medium (4+") sized tangs, a medium sized foxface rabbit, and a large maroon clown.
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