Emerald Crab Pro's and Con's

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What have been your experiances with these guys? Thinking of adding one for my viola problem.

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Hi Reefdawg,

I have had mine for about 6 months now. He has eliminated all of my bubble algae and cleans up any un-eaten food on the bottom of the tank. I have noticed him climbing on some of my soft corals every now and then but he has not caused any noticable problems. I have heard of others having problems with these guys eating corals and coraline algae though.



RD--It's kind of a gamble. The first one I had was fine for about 3 months, then started to go after a newly added torch coral. I removed him and went emerald-less for a while until the valonia got really bad. I tried another one, and this one has been fine for about 6 months. He has gotten huge and eliminated the tank of valonia. I later bought another one for a different tank and he is ok as well. So, you may have to try a couple of different ones, but it is definitely worth the effort. Good luck,

Larry M

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I bought one for valonia control. The only things I ever saw him eat were coralline algae and mushrooms. They seem to be one of those hit and miss type animals. Some people have good luck with them, some don't.


mine mostly eat micro algae they will olny eat the bubble algae if they stumble into it but they don't seek it out.
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