Hello everyone! I need some advice guys. Not sure if you guys read my last post but I was planning on getting a blue spotted puffer. He was quarantined at my lfs for a week and was doing great. I added him to my tank about two weeks ago and he seemed okay. In the tank I have a clown fish, foxface and coral beauty one day about a week ago I woke up to find the puffer had passed. I went right away to have my water tested and everything seemed okay and normal so I assumed it was just some freak accident. However yesterday I noticed my coral beauty which I had for about 2-3 years had died and im not sure what to do. Do you guys think its something in the tank? Are the other fish at risk? Mind you they all seemed normal until the died the puffer seemed to move a bit slow but I thought that may have been just his personality. It may just be sad coincidence but I'm not sure.