Help, yellow tang breathing heavy!

[Trigger Man]

I had the same thing today with my Achilles tang, it was breathing quick and heavy and not eating. Yesterday everything was fine. By this evening the Achilles ended up dying. I did pick up a few corals yesterday, so I'm pretty sure there was something on it. As well my Kole tang is now acting the same way. I've got lots of waterflow and have just completed a water change. All water parameters check out good. If you get a chance pm me where you picked up the bubble coral from.