Lost my first red crab

wrote in message
oups.com...
True, I agree with you.

The only clue is the fact that crab lost legs... Could it be a lack of
calcium?
I put small pieces of egg shell in the water?
Iodine perhaps?

I've had a japonica in my tank for a couple of years now, don't really see
him around much and seems fine, and haven't really ever done enything
special for him.
if there anything that I should be adding, first time I've seen iodine, how
does this affect the other fish?

A