Tank is crashing :(

[Frogger]

Originally Posted by iceman86

I was sitting at work this morning and thinking about this lol I then realized that I added a clown tang around that sane time the problems started happening. The tang was fat when I bought him, but slowly got skinnier and skinnier even though I was feeding him a ton to try to fatten him up. He ended up dying 2 weeks ago. Found his skeleton on the sand bed. All my other fish and tang are healthy and happy.
Could it be that this fish brought in a coral killing disease?

I am not aware of any disease problems that a fish can cause to your corals. I believe a large dead fish could cause a spike in your ammonia levels.