What to do with a molted shell?

[CGQ918]

Before I have heard they get protein from it and to leave it in. I have 4 Crayfish though. One just molted so what do I do with his shell?

[sheamurai]

I personally don't like the look of them hanging about.

Any nutrients/minerals (I would rather think they got calcium, not protein) they get from the shell would be negligible. Far better to use water changes to replenish minerals.

I don't think it matters one way or the other tho. No harm to remove, no harm in leaving.

[SmokeyCFH]

leave it, most crawdads and crabs eat their shell to get calcium to build up their new shell.

[PuddlesAquaFarm]

I always leave them in and they disappear after a day or two. I figure its the natural way of things, so I let them eat it. The calcium boost and such is just a bonus.