Ok here is the deal, I started building a 600 Gallon plywood and Glass aquarium in my basement. The inside Measurments are 8'x4'x2.5' (LxWxH) originally it was for Malawi Cichlids but after looking in these forums more and more I've decided that Having an Arowana tank will be much more satisfying. So my thought was 2 Silver Arowana 2-4 Oscars and 1-2 FW Rays and/or Catfish and a comon pleco I already have thats outgrowing my current 55G. Its going to have a 90 Gallon wet dry filter hooked up to a 3500GPH pump. What would be my best stocking options to get the best community going? The tank is still a month away from being completed so I have lots of time to research.
Here is what I have done as of today.
Here is what I have done as of today.

