You don't need a substrate, also don't put any live rock into the tank. The copper you add will kill of anything in the live rock. Running carbon will "pull out" any medication in the water. Just put a piece of PVC pipe into the tank for hiding spots. Put a foam block into your filter and monitor your ammonia levels because you won't have any bacteria to control it. I just shut down a hospital tank today and was doing partial water changes every day to keep the ammonia in check.
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