I have two adult Cobalt blue males and two females, the males are so beautiful I can't fathom re-homing them. They've been in the same established tank since juvenile for 3 years now and while they've always been aggressive, it's gotten out of control. I think said aggression led to the death of one of my female yellow labs, but they are always chasing someone around the tank. It has gone from a quick chase to an extended chase in some instances, through the rocks and such.
5 cobalt blue (2 female, 2 male, the fifth is young so I have no clue)
2 yellow labs male
2 yellow tail acai one male one female
1 demasoni sex unknown, i'd guess female.
5 rusties, not sure of sex.
1 ob, sex unknown.
1 BN pleco
All water parameters are good. This is a well filtrated 4ft 55gal with a lot of rockwork and hiding spaces.
I was thinking of removing all the rockwork, rearranging it and changing the tank temp from 81 down to 79.
Please chime in with suggestions. I cannot re-home these guys though.