Shrimp/crab molting

[andyroo]

Folk,
In a tank with (the likes of) loaches with sneaky, gluttonous little ways and a curious nature, how do your shrimp fare during molting?
Mine (>2" - >4" fan shrimp) are holding their own nicely now and have been for a good while, but I wonder what's going to happen when a/the molt comes. I also wonder if a molt has already occurred- I've seen cast shells but don't know what the outcome was as my shrimp are very cryptic. The cast shell was gobbled up over a day or two, I'm not sure who did it though.

I've got lots of little refuge spots: bamboo, slate, plants and stones.

A