I have a pistol shrimp/goby combo in my tank. He takes/flips over/tilts ANYTHING I leave on the sandbed. He's moved coral glued to baseball sized rocks, the little guy is an engineer. He flips rocks completely over, and my LPS really doesn't like that. I think he'd be impossible to catch (he uses the PVC I used to support my rock structure together to escape). He buried a 3 headed lobo while I was gone for 4 days and I've had to nurse the thing back to health. Short of glueing everything down and just using the light intensity to adjust the lighting - is there anything I can do?