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Old 08-10-2012, 03:12 PM   #1
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Stuff growing on my live rock

I changed my water 4 days ago (20%) and I use RO/DI water. I got up this morning and I have this yucky fuzzy brown stuff on my live rock. My readings are as follows:

56 gallon tank- 1 clown fish, I coral banded, I fire shrimp, 1 peppermint shrimp, 40lbs live rock


Salinity: 1.025
Ammonia: 0
Nitrites: 0
Nitrates: 0
Phosphates: 0 (yeah!! Finally)
PH : 7.8 ( stable at this for months)
Calcium : 560 ( I test for this but need to research more so not sure if this is bad)
Copper : 0
Dkh: 9 - 161.1
Lighting: coralife dual fixture with two T5...just put new bulbs in 4 weeks ago.
I feed every other day.



I think my water looks good. I have my lighting on around 8 hours a day. Why am I getting this fuzzy brown stuff now? I change my water every 8-10 days religiously. How do I get rid of it??
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Old 08-10-2012, 08:04 PM   #2
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IMO its brown algae, it will go away, eventually. You can scrub it off but it will come back. And I think it beneficial to some degree
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Old 08-10-2012, 08:07 PM   #3
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What causes it? I thought that only happened to new tanks or tanks with "issues". I've had some nitrate and phosphate issues a few weeks back but since corrected them.
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Old 08-10-2012, 08:15 PM   #4
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Things like this linger...for awhile. I have 0 TDS reading out of my RO/DI, feed once a week, and have 4 fish in a 55 gallon. I still have brown algae all over the glass and sps. I clean the glass atleast once a day and always spot check my sps with a turkey baster. I just can't win this battle. This is still fallout from when my hair algae outbreak died when my old ro/di needed its filters replaced and i didn't notice. Oh the phosphates that come from well water with a corn field above it...
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Old 08-10-2012, 08:32 PM   #5
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I'm planning on adding a few "beginners corals" but I can't until this is cleared up. I want to start out with everything as perfect as possible. I read that you are supposed to "starve" this stuff but if your water is good, you aren't over feeding, and you have good tank maintenance, what else is there? Guess I will be scrubbing live rock this weekend too. Will it hurt my live rock?
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Old 08-10-2012, 09:12 PM   #6
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I wouldnt scrub. Id wait it out. It comes and goes. Not a bad thing. Just a little ugly.
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Old 08-10-2012, 09:39 PM   #7
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^^^^+1 let it die off then vacuum up as much as you can so it dont feed the next cycle.
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Old 08-10-2012, 11:07 PM   #8
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I clean my glass and do a 15% water change almost everyweek in my 29g, I only had this brown algae issue in the beginning but my tanks only 6 months old so...
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Old 08-11-2012, 06:11 AM   #9
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I guess I will see if it subsides. I have no idea where it came from because my water is the best it's been in months. It's really irritating that you get one issue resolved and up pops something else..
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Old 08-15-2012, 12:10 AM   #10
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My only suggestion would be to cut your lights by one hour a day for a couple of weeks, then see how that does. New bulbs may have contributed even though the quality of light is much better with the new bulbs. Your white's are probably brighter (more intense) with the new bulbs.
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