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keyozoxmfc
09-20-2006, 11:39 PM
hi i have an emerald crab and i bought a lot of fiji premium rock...and it seems like my emerald is eating it. a large amount of spots that were once purple are now white. it started when i added him. and i saw him picking at it? anyone know whats wrong?or any ideas of another thing that is making it dissapear? and there is a small patch of hair algae that i was hoping he would eat too.
thanks
MARK

PSH
09-21-2006, 04:58 AM
To me it sounds like after your rock was exposed to air the coraline started to die off. It happens to my powerheads when I take them out to clean them. Most likely it will start to grow back as the tank matures.

keyozoxmfc
09-21-2006, 06:54 PM
but my rocks were fine before..and the coraline started to disappear after i got the emerald crab..andi saw him picking at it?

CarmieJo
09-21-2006, 08:23 PM
Hi keyozoxmfc,

I don't have an answer for you but I did want to say :welcome: to TR.

Rob
09-22-2006, 11:00 AM
how long were the rock in the tank before you added the emerald crab?
and how long ahs the tank been setup

BradJ
09-23-2006, 11:47 PM
I had 2 red mithrax crabs that did the same thing. I had to remove them. They were completely cleaning coraline covered rock to pure white.

I also have a small green one without any problems. I think it just happens with some crabs. I would get rid of it.

m8298
09-25-2006, 08:01 PM
What are your Calcium and Alk readings???

keyozoxmfc
09-27-2006, 07:19 PM
tank has been up a month and a half....my calcium is at 400-420 and my KH is at 10-12..but i got rid of the crab and exchanged it back at my LFS for another one...now this one seems kinda sluggish...lol i have the worst with these emerald crabs..but i do have astrea snails and blue legged hermits

randyk
10-18-2006, 12:59 AM
While they prefer hair algae, emerald crabs will eat purple coraline algae as well, especially if there is not enough hair algae to feast on.