Just to clarify. A 125 is 72”x24x18 roughly.
A 72x24x24 is a 180
If your tank is a 125 I don’t believe that it will be adequate for a fully grown peacock especially if there is other stock in this tank.
Looks like oscar, parrot, jag , tiger mota, convict, Bichir? And A couple others cichlids I can’t tell exactly what they are ? and Alligator gar which alone can grow to 6 to 8 feet!
I recommend you thin the stock out tremendously.
