[usnthem]

Good day Everyone;

Having a problem with a yellow-lab's aggression/bullying. In Sept/Nov he chased and killed a y-lab. At that time there was just the 3 of them, it was going to happen. Over time I added more fish, see make-up below. For the last several months his behaviour has been typical a chase here and there. Some what letting all tanks mates know who is the boss. But then all of a sudden, 3 days ago, he really turned up the juice and without prejudice took to one of the other labs, which passed away this morning. My question to you everyone is, what do you beleive should be my next move? Buy more y-labs, net just him and replace him, net all the y-lab's and replace with more peacocks or other type?
As always I welcome your feed-back.

Tank make up:
Aquarium: 65 Gal H (36Wx18Dx24H), tank cycled 24th September, 2007.
Current Fish: 5 various peacocks (sizes 3 - 5 inches) & four (was five yesterday) yellow-labs (4 inches) (one holding, her second time).

 

[dtress3]

I would bump your numbers of yellow labs to 6. If your dominant one gets too aggressive with another fish resulting in severe injury or death, then I would remove him. Typically labs are more peaceful, but they are still mbuna.

 

[DJRansome]

I think I would take all the labs out, since it is a 36" tank and see if the peacocks do better on their own. At minimum I would remove that male since he is a proven troublemaker.