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Old 01-18-2012, 10:03 PM   #1
cr500_af cr500_af is offline
 
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Emerald crabs... myth or magic?

OK, I've heard for years now that emerald crabs eat bubble algae... almost always, some of the time, most of the time, whatever.

I've had a little bubble algae in my DT before, and bought two emeralds (who never touched it). I've done sort of an informal poll among some friends who have tried them, and so far it is looking bad for the myth. I've yet to get a response that they in fact ate it.

Now I've got some on some rock in my frag tank, and I'd really rather not nuke this rock... I really can't, since there are a lot of acans growing on it.

So, considering that another adage is "there is no such thing as a TRULY reef safe crab", I'm thinking it would be a waste of $.

Have any of you had emeralds that actually, reliably ate bubble algae?

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Old 01-18-2012, 10:05 PM   #2
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Old 01-18-2012, 10:06 PM   #3
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The place we just did the group buy of the CUC swears there's eat it. They even put a guarantee on them,

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Old 01-18-2012, 10:07 PM   #4
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Old 01-18-2012, 10:08 PM   #5
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Started having a little bubble algae issue, added a couple emeralds... still have the bubble algae. Ive seen the crabs climb over the bubble algae to reach something else.

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Old 01-18-2012, 10:09 PM   #6
cr500_af cr500_af is offline
 
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I am starting to see a trend here.

The only live animal I've seen eat it was a Foxface, and I know that was an exceptional case. Much like Rob's Scopas that eats bryopsis, or my Flame Angel that eats Asterina starfish from time to time.


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The place we just did the group buy of the CUC swears there's eat it. They even put a guarantee on them,
That seems like a pretty safe move on their part... if it doesn't eat it, how many people are gonna ship a live crab back? The shipping would cost more than just forgetting about it.

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Old 01-18-2012, 10:23 PM   #7
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I catch my yellow tang picking at the algae every once in awhile. But when he sees me looking, he just stops. Im then left to wonder if he was really eating it or maybe that Im just hoping he was.

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Old 01-18-2012, 10:26 PM   #8
cr500_af cr500_af is offline
 
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I had a naso in a 55g qt for a while, and I intentionally put rock with BA on it in there. He ignored it until it turned glass-clear from lack of light (about 5 weeks). It was still alive though, and he never touched it.

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Old 01-18-2012, 10:33 PM   #9
The-Bubonic-One The-Bubonic-One is offline
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Quote:
Originally Posted by reeferJ View Post
I catch my yellow tang picking at the algae every once in awhile. But when he sees me looking, he just stops. Im then left to wonder if he was really eating it or maybe that Im just hoping he was.

My sailfin does the same. He will eat bryopsis if I look at it. He's like a dog trying to please his master.
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Old 01-18-2012, 10:38 PM   #10
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I have had some that did and had some that didn't. I think it is like everything else, if they can find other food they like better, they leave the bubble algae alone. If that is all there is, they eat it. I also think their bubble algae eating varies from individual to individual, like almost everything else.

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Old 01-18-2012, 10:56 PM   #11
cbj25 cbj25 is offline
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i have had results with multiple emeralds in a tupperware and setting pieces of rock with BA in there. not really to practical for the normal reef keeper but a little trick i used while working at lfs's

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Old 01-18-2012, 11:05 PM   #12
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Old 01-19-2012, 12:01 AM   #13
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I have one that eats it sometimes. I will have 2-4 bubbles and might take 6-7 days but then the next morning they are gone. Doesnt eat it all the time but he has alot to eat since he is the only Emerald Crab in my 325 Display.

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Old 01-19-2012, 4:52 AM   #14
rdnelson99 rdnelson99 is offline
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Had a small outbreak of BA not long after getting my tank up and running. I got three emeralds. Two small one large. The two small ones wouldn't look at the stuff. The big one happened upon it one day and discoverred how much he liked it. It was fun to watch because he would pull so hard on it that when it broke free he would almost topple over backwords. He cleaned it up in nothing flat.

Now, several months latter, I have a bit that has returned. I don't know if he just hasn't gotten up that high on the rock or if he lost interest but he hasn't touched it.

So as to to the original question I would say it isn't a myth. It just isn't foolproof.

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Old 01-19-2012, 5:41 AM   #15
JennM JennM is offline
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I've watched Emeralds eat bubble algae.

If I have a rock with bubble algae I'll put it in a tank with an Emerald or Emeralds, and it disappears.

I guess your mileage may vary but I've had good results.

Rabbitfishes will eat it too - if your tank is big enough, that's a good choice too.

Jenn

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Old 01-19-2012, 7:14 AM   #16
stacy22 stacy22 is offline
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I have had emeralds that ate bubble algae. I saw them.

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Old 01-19-2012, 9:50 AM   #17
Raz0945 Raz0945 is offline
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I have about 15 emeralds (6 tanks) and they eat a little bit of everything (including BA), they also keep my frag racks clean. I have had a problem with one, only because he has gotten so large (he pushes over coral), he now lives in the sump and helps keep the rock in it clean (I do give him a little extra food). I try to buy females they tend to stay small (if I'm wrong on this let me know-female small/males large with big arms).

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Old 01-19-2012, 10:24 AM   #18
126 reef 126 reef is offline
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I have had emeralds that eat bubble algae and Zoas. Be carefull! Not easy to remove from a reef tank once they start to misbehave

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Old 01-19-2012, 11:38 AM   #19
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Old 01-19-2012, 12:45 PM   #20
Tony_Caliente Tony_Caliente is offline
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Maybe

Maybe they only eat it, if you watch them! LOL

Mine never touched the stuff.

Quote:
Originally Posted by JennM View Post
I've watched Emeralds eat bubble algae.

If I have a rock with bubble algae I'll put it in a tank with an Emerald or Emeralds, and it disappears.

I guess your mileage may vary but I've had good results.

Rabbitfishes will eat it too - if your tank is big enough, that's a good choice too.

Jenn

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