I had thawed a cube of frozen food (Prime Reef? I dont remember for sure but it is not the frozen brine. it has clams and shrimp, etc pieces) to feed the Red open brain and fungia in my nano and what I did not use I put into the trap. Then I put the trap near the rock and excavation work of one of my know crabs.
I was expecting to have a hermit or two also but they stayed away. Those lil pigs are so full of hair algae I dont think they can move to find more food. LOL
i found a link
tampabaysaltwater.com/trap.gif to that design on the TBS website. It is just a 16oz water bottle with the top cut off then take the top piece and place it into the bottom section. I also poked a few small holes in the bottom of the bottle so water (and the scent of the bait) could flow through it.