I bought 4 anthias on Saturday, they looked fine at the LFS. Once in the tank the smaller of the 4 sank straight to the bottom and hasn't moved or eaten since. I've been feeding live brine shrimp 6 times per day. The 2 bigger ones were eating flakes. Got up this morning to find the biggest one who looked healthy, dead and the rest not looking great. Is this the norm for anthias or did I get shafted by the LFS?