Whats the deal with my new oscar?

  • We are currently upgrading MFK. thanks! -neo
yeah sounds like an aggression issue to me, since he is so much smaller and the other O is used to having the place to itself, thats good that he is acting normal again the large may have decided to tolerate him but i would keep a close eye out for aggression or signs of damage to his fins

and yeah in low oxygen environments the fish will all go towards the top of the tank with the bodies angled with their faces getting as close to the top as possible (this really weirded me out when this happened to me and i couldnt figure it out and then i realized my spray bar was below the surface and not agitating it so they weren't getting any air, once i fixed it they were back to normal within minutes) but like i said this particular case definitely sounds like aggression
 
Sab_Fan;4353722; said:
I have noticed that bullied fish often hang out near the top of the tank, for whatver reason
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I have had this happen to several of my fish due to aggression. He probably hides at the top after being chased around by the 10 incher.
 
Could be chasing. Could also be differences in water quality. How low do you keep your nitrAtes?
 
I caught them in action. It's the 10 incher chasing the smaller one around the tank. I did a water change and rearranged the decor. so hoepfully that will distract him for a while. I'll keep you posted. The water is fine.
 
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