So for the longest time my RBTA was healthy and happy on one of my rockworks. That was until last Tuesday when it decided that it would wander around the tank.. and I mean wander. I continually checked my tank that day via my security cam and it went from left corner of my tank, to the front glass, and finally bottom right of the tank very close to my power head. When I finally got home that evening, I was able to move it back to the rockwork where it originally stayed. Ever since that evening though, the nem has retreated into a big crevice behind the same rockwork towards the substrate. I looked for the nem this morning and it's still nowhere to be found, I'm assuming it's still in that crevice. My concern is there's no way the RBTA is getting any light in that crevice, and it's been two days. Should I be concerned? Should I pull out the rockwork and pull the nem out or should I just wait it out?