Inverts dying

[Jay-rod20]

Well I had a new mantis shrimp pass away right after I got him and now I've noticed even reef crabs are dying after 24 hours in the tank. Its a 29 biocube. Allllll my levels are perfect. I just pulled 3 damsels out and have added a banded goby and 2 wild caught percs. All the fish and snails are happy as can be and look great but inverts can't last 36 hours in that environment? What is going on?? The reef crabs I have noticed are dead outside of their shell?

 

[Rosesrblu1]

What kind of water are you using? Sorry for the losses.

 

[Ingy]

What nitrate levels do you have?

 

[melosu58]

Was that tank ever exposed to copper treatments for parasites? Inverts can not tolerate copper.

 

[bskerrichard27]

Sounds like stray voltage to me