Nox-Ich is malachite green based. While it does not contain copper (C23H5N2) is is harmful to inverts. The problem you have on your hands right now is the chain reaction caused by the death of the livestock and the spike in toxicity. If you have another tank you might want to move your remaining livestock to a temporary home while you deal with the problem tank. If your main tank is small you might be wise to gut it just to be on the safe side. If you are still unsure about the copper thing I have a copper test kit that you are welcome to borrow (just pm me). Hopefully you have caught the problem in time to prevent any more death.

Although the chemical (Malachite green) can leach into the rock and silicone, it won't be released back into the water like copper would. Carbon will remove what is left in the water.

+1 on the carbon, some Purigen or Chemi Pure in addition to the carbon wouldn't hurt either.

Sigh :sad:

Thanks alot for all the info, I guess we will have to get a new tank for corals.

If your copper test is negative you don't need a new tank. Coral will be fine. Once M.G. is absorbed its basically gone. Water changes and carbon and you'll be good to go.