New additions...HELP!

[Telford]

I added a copperbanded butterfly, sailfin tang and six line wrasse to my tank yesterday. When i woke up this morning and the lights came on, basically all the fish in the tank were breathing rapidly and very lethargic. Also, my pulsing xenia is limp and very dead looking.

I checked ammonia and it's at about 0.25 ppm and nitrates are at about 10 ppm. Are these levels significantly too high? Are all the fish just still ****ed off about the new additions?

Current stock is 2 small clowns, 1 yellow tang, 1 blue regal tang, foxface, yellow head goby, 2 scooter blennies, the new sailfin, copperband butterfly and six line wrasse. As well a very light stock of a few soft corals.

No, i didn't add any of the bag water to my system.

Any help/feedback appreciated!