Added a Tuxedo urchin 2 days ago and came home from work to find it dead in a low flow stop. The same happened to a blood shrimp a couple months back. I'm thinking either the tanks to new or something. Asked my LFS and he said that's probably the cause of the death with the shrimp. So that's my thoughts as why the urchin passed as well but not sure. I've read and seen videos of people introducing them to fairly new tanks so I'm debating on getting an ICP text to kinda rule out if it's something in the water. But all my other fish coral and inverts are doing great no other casualties any tips are appreciated. Thanks