[pogodzib]

Sorry to hear about your losses. At least next time you'll be prepared and should be able to react more quickly.

One more thing that I can add for you is that the amount of people that treat using copper has gone down as the popularity of refractometers and the hyposalinity method use has gone up. The reason being is that many people, myself included, feel that copper is a harsh treatment method and that hyposalinity is easier on the fish. This is definitely true for tangs since the copper can mess with their digestive system and being able to digest algae. Because of that, I usually recommend (although a little late this time) that the hypo treatment method, using a refractometer, is used with tangs and whichever method is prefered for most other fish. Copper is often the best treatment option for other diseases or if you are unsure if you have ich or Amyloodinium Ocellateum. In your case, if the copper was dosed correctly, it didn't kill your tang since the effects of copper on the digestive system of tangs causes them to starve over and extended period of time and wouldn't have killed the tang so quickly. Hopefully, your clownfish is on its way to recovery.