duration of pistol shrimp molting

[eaglesrx]

does anyone know how long it takes for a pistol shrimp to molt? I have a randalli pistol shrimp that I've had paired with my yasha's in my nano tank for several weeks now. Since 6/10, I haven't seen the shrimp or seen any sand moved during the day or to close up the burrow he shares with the yasha. The yasha's always come out though.

Thanks for any insight.

[Ricunger]

You see him yet?

[eaglesrx]

nope; he's definitely dead. I picked up a new pistol at a local store he paired right up with my yasha's. so, looks like somehow he died. not sure how, though. maybe the water change? I thought he simply had a bad molt. Not sure why though.