What kind of response is this? Did you have CK's before this current one of yours? A lot of fish would change temperament during growth cycles, e.g jardinis would go nut after reaching 12", so I wouldn't make that recommendation unless you've raised one to maturity.
My clown knife is now 7.5", no aggression towards any of his tankmates. His tankmates are: 1 yellow tail acei (2.5"), 1 firemouth (3.5"), 1 convict (moved to my 120g, but got along fine), 1 gold severum (3"), 2 parrots (2.5"), 1 yellow lab (3"), a green terror (3"), a pleco, and a 4 line pimelodella catfish
and we aren't talking about jardinis here, were talking about KNIFE fish and cichlids.

You shouldn't even be commenting on this guys thread, I bet you've never owned a knife fish
