03-13-2013, 12:32 PM
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Is this way for many cichlid's that get along when small, but as they become sexually mature, or approaching adult size,they then can become more assertive/aggressive.
Is particularly common when one fish is interested in mating but the other may be too young, or not interested.
Raised a young group of Discus that most consider a rather peaceful cichlid, but as they approached adult size,, I was taken back by their territorial disputes, and aggressive behaivor at feeding time.
Lowering temp can sometimes work by slowing down metabolisim's , but in some cases,, the fish may need to be moved to other tank's for their own welfare.