Ok.. so I thought I would give an update. Whatever was in my tank wiped it out completely. After the puffers died, I only had a foxface, flame hawkfish (in the sump) and 3 chromis. I moved the foxface and hawkfish to my LFS. He has them QT'd and treating them for me while I figure out what crashed my tank.
The hermits, corals, starfish and snails are all fine. However I am having a brown algae bloom that wont go away. So I think somehow the meds caused my tank to cycle again.
NTS? I dont know, my system has been running for 3 or 4 months now.
2 chromis ended up dying as well, and the hermits and snails feasted on the body. There is only 1 chromis left, he looks healthy and greets me everyday when I get home to get some food. Hes a little weird though, anything I put into the tank: my hand, the prongs or net.. it looks like he swims by it and wacks it. Maybe this little guy is the culprit and stressing everybody out
jk