Hi, Im a first time poster so forgive me for being so verbose.
I'm hearing these constant snapping/clicking/dripping sounds coming from my tank. I do see that there is water dripping down into the tank from the filter, but those drops dont compare to the loud snapping I hear from across the apartment. I hear it constantly throughout both the day and night, with no difference in frequency. Sometimes I hear two snaps at a time, other times I just hear one. I have three small-medium yellow tail damsels, 2 pep shrimp, and a med-large sized red crab (was a hitchhiker, dont know what species, but it looks just like an emerald crab, only red) and nothing has gone missing.
I added LR to my tank about two weeks ago, and soon after I noticed a pair of stalked eyes poking out of a hole that looked very much like mantis shrimp eyes. I took evasive action and did a freshwater dip to try to get the little bugger out. After a long battle I saw nothing come out of the hole and figured it moved to a different rock. Since then I noticed the shrimp in the hole, only it wasnt moving. I tried poking in with a long feeder stick and I saw that whatever it was its dead now (not a molt because other than it not being transparent I've noticed it decaying inside the rock the past week). I figured the long fight of trying to get it out of the rock must have killed the mantis shrimp, and I felt a little relieved (and saddened for the poor guy).
Any ideas of what the cause is? Could I have another mantis shrimp? Or a pistol shrimp?
Thanks for reading, and sorry if it was too long. Ive just been going crazy trying to find whats causing it. While typing out this post I've heard maybe 2-3 of these clicky snaps. I want to add more fish and rocks to the tank, but fearful of adding any more food/hiding places if it is infact a mantis shrimp.