My silver arowana is about 7-8" and is in a 4x2x2, in the future he is goint into a 6x2x2, i was wondering if he could live with a pair of very mellow 12" Ocars, a pair of RTGG (again mellow, one of the RTGG used to live with the aro untill an incident with my dat) a perruno catfish and apair of baysnooks. He won't be moved into it untill hes about 14-15" and then we will upgrade when he needs it. What do you think?