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Old 06-26-2012, 12:43 AM   #1
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Open brain coral question

Have a metallic green open brain coral. It's been about two weeks, will he extend larger than this. Right now he is in a 38g tank with a 10,000k T5 and a actinic T5 above him.

Also is it a good sign that his mouths are wide open. Here are some pics.
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Old 06-26-2012, 01:32 AM   #2
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That looks like a Trachophyllia geofroyi. It's considered an open brain, but its flesh does not really "pop" out of it's skeleton. It's flesh hugs it's skeleton very tightly and does not extend far past it.

There is another specie of open brain in the same genus that some considered a folded open brain: Trachophyllia radiata. The flesh on these brains extends far outside it's skeleton bottom. radiatas tend to grow a bit more than geofroyi's since their flesh grows faster than the skeleton of the geofroyi.

Your geofroyi looks pretty health at the moment. The cyano near it though is a bit of a concern as it indicates a lower level of water quality.
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Old 06-26-2012, 10:55 AM   #3
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Ok cool , we have been in the process of riding the tank of red slime and it is gone as well a the cyano. We have better water now and upgrade to T5s . What about the mouths being open?
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Old 06-26-2012, 10:57 AM   #4
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Pic from this morning
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Old 06-26-2012, 12:19 PM   #5
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Quote:
Originally Posted by Clownfish25
Ok cool , we have been in the process of riding the tank of red slime and it is gone as well a the cyano. We have better water now and upgrade to T5s . What about the mouths being open?
Cyanobacteria is Red Slime Algae, same thing.
Do you ever feed it? Brains do well with feeding some meaty foods occasionally. Could just be hungry.
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Old 06-26-2012, 12:35 PM   #6
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Quote:
Originally Posted by Flreefer

Cyanobacteria is Red Slime Algae, same thing.
Do you ever feed it? Brains do well with feeding some meaty foods occasionally. Could just be hungry.
Yea we have fed it at night while the tenticles were out. Should I just squirt some mysis or phytoplankton in the mouths ?
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Old 06-26-2012, 12:39 PM   #7
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No, I wouldn't. If the tentacles come out, then feed it like you did. There isn't necessarily any problem with it.
It looks pretty healthy.
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Old 06-27-2012, 09:43 AM   #8
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No, I wouldn't. If the tentacles come out, then feed it like you did. There isn't necessarily any problem with it.
It looks pretty healthy.
Ok. This morning it looks like its splitting down the middle any idea? Is this normal?
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Old 06-27-2012, 11:13 AM   #9
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Well there are 3 possibilities, it's either splitting to produce another head. It got damaged by something else in the tank. Or it's dying. I don't think it's the latter, because they usually recede from the perimeter, not split up the middle.
When looking back at your first pic, you can see the split just beginning. This lends me to think that it's reproducing. Most corals look bad while they do this.
If you are getting Cyano though, you must have some nitrates. What is your nitrate level?
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Old 06-27-2012, 04:24 PM   #10
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Quote:
Originally Posted by Flreefer
Well there are 3 possibilities, it's either splitting to produce another head. It got damaged by something else in the tank. Or it's dying. I don't think it's the latter, because they usually recede from the perimeter, not split up the middle.
When looking back at your first pic, you can see the split just beginning. This lends me to think that it's reproducing. Most corals look bad while they do this.
If you are getting Cyano though, you must have some nitrates. What is your nitrate level?
My nitrates are at twenty.
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