Well, the trap failed. I set the trap around 3 yesterday afternoon, checking every so often. Once I found a hermit crab in there, but otherwise nothing. I turned the lights off about 10 last night, checked about an hour later with the red light, nothing. Sneaked up on it and checked at 4:30 am with the red light, still found nothing in the trap nor anything moving about the tank. This morning I found one of my shrimp in there chowing down, of course.
I've heard that you can take a piece of rock and sit it in a bucket of salt water, then use a baster to squirt freshwater in the holes and anything in there should come out. However, I'm not sure if that'd kill everything else on the rock that I paid for to begin with. I'm really not sure what to do next, so any help would be appreciated.