Welcome to MAAST beareef19!

I myself have a clicking when "lights out." I believe it may be a pistol shrimp (please be!!!)...all my fish/shrimp are fine. Going thru snails tho. I'm going to try a few different methods to catch it...

Another good method told to me that I haven't tried yet is to put bait (krill?) wrapped in panty hose and weigh it down (rock?) so that the shrimp doesn't carry it back into the rocks. His claws will get caught in the hose.

The bottle method worked for me on some fiddler crabs that had hijacked some LR I bought. I still have 2 small crabs. Hopefully I'll catch them also. Good luck & welcome again.

AND if I do catch this thing...anyone that wants him before I get to the "septic tank" is welcome to him. ;)

Sherri