Hello! As some of you know I am considering getting an aquarium that features a black arowana, along with some motoro stingrays and discus. I have two different dimensions for an aquarium and I was wondering which one do you think would best suit an arowana. The first is a 500g with the dimensions of 120Lx36Wx30H inches. The second tank is 535 gallons and measures 96Lx48Wx30H. I really like the first due to the length which would offer better aesthetics and potentially better space for individual territories but I am worried about it not being deep enough. What do you think? Thanks!