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Old 09-13-2012, 10:10 AM   #1
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New LR turning black?

I started a 29 biocube when I moved into my new apartment about a week ago. I had a hermit crab, fire shrimp, and 2 nassi snails in a 6g so I put em in the 29. I put about 9 pounds of LR in to get started with a bag of LS (it's a 1.5in deep bed. I used live seawater to help the cycle along too (I'll mix my own once it's done cycling).

One thing I have noticed is some parts of the LR are getting these black stripes, and I was just wondering what this could be. I got 5g of RO water from the LFS that I have been adding in for top off until I get my ATO setup again. I posted 2 pictures below, but they look worse then what it really is. Should I just let it rock for a bit or so I need to do something about this now?
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Old 09-13-2012, 03:03 PM   #2
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It could be cyano from a die off in the rock. If it can be siphoned off I would do so, otherwise I would be doing real water changes and monitoring every other day.
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Old 09-13-2012, 04:52 PM   #3
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Looks like die off what type of lights and how close they are could be a factor. Test your water and everything should be fine.
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Old 09-13-2012, 08:59 PM   #4
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Quote:
Originally Posted by Gregcoyote
It could be cyano from a die off in the rock. If it can be siphoned off I would do so, otherwise I would be doing real water changes and monitoring every other day.
Yep, definitely looks like a case of cyano
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Old 09-15-2012, 09:00 AM   #5
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Wow that's not what I waned to hear. Isn't cyano the worst thing to have in your tank. I had it real bad in my little 6g and that's what made me start over, now I'm getting it in this tank? AWESOME!

As for the lights, I just have the stock ones that come with the biocube, and I leave em on for about 8 hours a day, then I turn the moonlights on. maybe I should only put the daylight bulb on and scratch the antinic until I have coral in there?

What should I do to fix this problem now so I don't throw this tank out lol
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Old 09-15-2012, 09:37 AM   #6
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Cyano really isn't bad at all. It's just a bacteria. It's eating excess organics. So when you get rid of those organics through water changes, the cyano will starve and go away.
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Old 09-15-2012, 10:05 AM   #7
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Cyano really isn't bad at all. It's just a bacteria. It's eating excess organics. So when you get rid of those organics through water changes, the cyano will starve and go away.
Some species of cyano can release toxins but for the most part i agree that cyano in and of itself is not harmful other than if out of control it can smother coral
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Old 09-15-2012, 11:51 AM   #8
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If you're cycling with only live rock you could use the blue lights and not the daylights. A big factor with cyano is low water flow, especially if it's growing on the rock. Do you have any powerheads in the tank?
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Old 09-15-2012, 05:05 PM   #9
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Yeah I have a koralia nano in there but I was thinking maybe getting something a little bigger? Also i saw on amazon I can get a protein skimmer that will fit in the back of the biocube. Would that help keep things under control?

A side note...I tried rubbing the black stuff off and it is really on there...it's almost a part of the rock
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Old 09-15-2012, 06:05 PM   #10
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Originally Posted by FishN00b83
Yeah I have a koralia nano in there but I was thinking maybe getting something a little bigger? Also i saw on amazon I can get a protein skimmer that will fit in the back of the biocube. Would that help keep things under control?

A side note...I tried rubbing the black stuff off and it is really on there...it's almost a part of the rock
Skimmers on cubes don't seem to produce much foam. Cyano should just blow away...must be something else related.
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