There are varying reports about the Crabs being alright in FW
. Mostly they are not really, and that they need some salt in the water.
I kept some on the advice of the lfs
guy who said his were 3 years old and were just fine.
Here is a pic. He is on a turtle island from the pet store.
They were in a tank with young Angelfish and pretty much kept to themselves.
I had to tape up the back of the tank with heavy duty plastic wrap doubled and duct taped so there were no gaps.
I always thought of doing a hamster habitrail thing out the back of the tank and hamster tubes into a sand bed area with water and shells like a beach thing where they can bury in sand with a sun lamp too.
But there was a pH crash and I didn't ever start over with them.