I currently have two Cacatuoides in a 12 gallon with 3 rummy nose tetras. One is about 2 inches and the other is slightly smaller. I am hoping they are a pair. My LFS recently ordered some Njisenni juveniles and I wondered if I should get some. In a previous post, Neil said that Njisennis are more aggressive and may be too aggressive for the Cacatuoides. Will this occur even if they are still juveniles and grow up together or will problems only flare up during mating?