Whats a cool fish for a 180gal? Along with a arowana, pacu and pleco? I want something that is interesting to look at with some hot colors? Also I dont want a stupid fish like a pacu that smashes into the walls when do sudden moments. I dont want a fish that gets bigger than 12" either. I want something that reconigzes me and the keeper. I'm thinking of a albino oscar, but I kinda want to move away from that amazon look.