Hi I recently bought a copperband and was told they are hard to care for. The problem I am having is that he is seeing his own reflection in one side of the tank and he thinks it is another copperband and he wont stop hiding down in a corner. Every time he ventures out he sees it and runs back to hiding. I dont know why its just the one side the reflection bothers him. Any ideas on what to do? Is there a black material I could put iside the tank to stop the reflection or will he get over it after a while?