Emerald Crab turned White?

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NanaReefer

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This is the first in this tank but second one I've owned. Both turning white within a week after introducing them to my tank. What gives? I've never seen a crab do this before.
 
Sounds like there isn't enough algae for it to eat. I've had 3 that turned white then died
 
I'm feeding it 2-3x a week, takes the algae wafer right from the tines, besides the bubble algae, a small clump of HA and detritus that's in the sump. What else do they eat?

Not my pic, mines more white.
ImageUploadedByTapatalk1428033363.774815.jpg
 
Mine did the same, and I don't know if the lack of algae was the reason, but I didn't have any algae in my tank so maybe.
 
What happened to the crab? I got an emerald crab today and in the store I did not realise how white he was until I got home....he's gone straight to town on some GHA though.

I've read its todo with molting???
 
What happened to the crab? I got an emerald crab today and in the store I did not realise how white he was until I got home....he's gone straight to town on some GHA though.

I've read its todo with molting???
This was from 2015...
 

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