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Old 06-17-2011, 12:50 AM   #1
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cyano outbreak?

I was growing some nice coralline algae on my rocks and it was spreading beautifully.

Then, I guess I thought it was still coralline (since I had never had it before).. so I let it grow and grow on the rocks.

Well.. it started to take over and now i'm not liking it so much. Is cyano algae bad for the tank? Because I have lots of it.

It is purple, and it can get stringy. I can pull it off in small sheet or mat like pieces.

Some of it has bubbles in it.

I guess what I'm asking is.. should I try to get rid of it all? Is it desirable to have? Negative effects? Is this just a phase my aquarium is going through (like diatoms)?

I read that it feeds off of high phosphates and low alk. I do have low alk (about 8 or 9 dKH). But I don't have anything to test for phosphates.

And finally, can it kill fish? I'm looking for a reason my royal gramma died on me the other day.
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Old 06-18-2011, 02:37 PM   #2
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Yes try to get rid of all of it. When you do your PWC`s try to siphon out as much of that cyano as you can. It`s being fueled by something. Either tap water, feeding too much or some other reason. We have an excellent article about it in our SW articles section. Hope you can get the upper hand on it.
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Old 06-19-2011, 08:34 AM   #3
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cyano can't kill fish, but whatever is fueling it was most likely the cause. i don't think low alkalinity causes cyanobacteria.
what are your parameters? feeding habits? water change schedule?
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Old 06-19-2011, 10:23 AM   #4
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One thing that will munch on the cyano are sea urchins. They have a MASSIVE appetite so I would only recommend 1. They will eat everything from red slime to algae. With one it won't eat all the algae that your other fishies like to graze on.
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Old 06-19-2011, 10:39 AM   #5
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i disagree that an urchin will eat cyano. while they do eat many types of algae, they won't go after bacteria. besides that, even if you had something that would eat the cyano, you would still have the same problem- it would be a constant problem because you never remove the source. adding more eating, pooping creatures is not a solution to excessive nutrients.
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Old 06-19-2011, 12:36 PM   #6
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I suppose it will help when I get my skimmer.

Right now I'm using "quick cure" because my fish appear to have marine ich or velvet. I left the rocks in because the guy at the LFS said it will kill the cyano and it has after one day. Now it looks like cobwebs on the rocks. I also cranked my temperature up to 82.

I just have to watch my parameters, since I don't know if it will kill my biological filter bacteria?

After that, I don't know how to stop the cyano short of the skimmer.

I feed twice a day. Pellets in the morning and brine shrimp at night. I have cut down on the amount I feed. I try to make sure all of it is consumed.. but I'm sure some isn't.

I do a 20-30% water change weekly.

My parameters as of this morning are:
amm 0, nitrite 0, nitrate 20, salinity 1.024, ph 8.0, dkH 9-10
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Old 06-19-2011, 01:16 PM   #7
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make sure you have good flow in your tank too with few dead spots usually the cyano will grow where the flow is the weakest
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Old 06-19-2011, 02:15 PM   #8
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It's not going to be a reef tank, right? Because quick cure has copper in it and the rocks will absorb it.
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Old 06-19-2011, 10:16 PM   #9
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Quote:
Originally Posted by Sarcothelia View Post
It's not going to be a reef tank, right? Because quick cure has copper in it and the rocks will absorb it.
>.<
are you serious

all of my planning has been to make this a reef tank
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Old 06-20-2011, 12:01 AM   #10
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Then don't use quick cure with live rock :O. Exposing live rock to copper essentially makes it a dud for future reef use.
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