I currently have a new 3" vittatus as well and he is kept with my 4" scomb. I have a Aro and a yellow tail bar in there with him. They all get along fine but I agree with previously said, payara only a inch bigger eating our tigers. Its a scarey fact. So I usually try to load my tiger and progress the growth in him so he isn't the most expensive dinner I ever bought for my fish. The way my payara looks at him is a curiosity I don't want to realize. I'm looking at giving up my scomb to another tank, giving it a month, and then putting in a 3 inch armatus.
Don't be surprised one day to be missing your VATF and your scomb has a fat stomach...

