I completely forgot to mention my planned stock. I have a 12" Leichardti Arowana and 3 17" black Arowanas that will go in with the stingrays. As for the future I have 6 atf (3 gatf, 2 taft, and 1 vatf) That will go in with the rays as well. They are currently at 6" but I want to wait until they are at least 8-10" before adding them in. Also once the black arowanas reach 2ft+ I am going to be moving them out.
Hopefully when the time comes everyone plays nice and I will have a top swimmer, middle swimmers, and bottom dwellers.