discus battle?

prodigious

Registered Member
Feb 17, 2007
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I have added a 4" king cobra to my tank after weeks of QT he has really disturbed the balance in my tank. My 4" blue diamond has lost his mind chasing him around the tank and has become quite aggressive after months of being passive? Obviously these guys are trying to be the dominant fish. How long will this continue and at what cost?
 
It could be for a week or more. What size tank and how many/what other fish?
 
Odd numbered discus under 6 have a tendency to play odd may out. This could cause that one to die. I understand it is best to add two at a time. Are the discus all about the same size?
 
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