Problem with shrimp dishes.....shrimp don't always leave the food in the dishes. Only shrimp I've ever had leave well enough alone were neos with a few CRS in with them. My CRS and tibee tanks now you can forget it. There's always a thief who will pull it out so shrimp dishes, though I DO recommend them just don't work in all tanks.
I'd like to add plant tweezers to the list (good for removing food, any dead bodies, etc)