Hello all. I have two, Giant Bumblebees, possibly about fully grown at about 9.5" and 11" living very happily in a 125gal tank with a 14" Sailfin Plec' with attitude.
When my sons Oscar is about 5" - 6" will it be safe to put the Oscar in with them? Will they be safe from each other??

Please advise experiences as my son bought Oscar to go in this aquarium with the cats. I don't thing our other aquarium is big enough for him/her.
Thank you for any advice received. B