Hey, the idea struck me for a ray in my 125 with an oscar or aro. The LFS has a couple of Motoro's in tank with thwo huge arowanas, and they don't seem to bother them at all, just cruise around at the top. What's the requirements on these cool creatures, cuz I'd love to get one. Requirements such as tank size, food, tank setup, growth size, temperment. Everything will be appreciated.