Hi all, I am a long time lurker, and decided to ask a question. I have a spare 40 gallon or so vertical hexagon tank. What would you guys recommend I use this tank for? I'm not the community fish type of guy, I like the aggressive fish a lot better. I already have a tank with an Oscar in it and love him a lot. He has a great personality. So what type of fish should I put in this tank? I was thinking about some kind of freshwater puffer, but they all grow pretty big except for the dwarf Indian puffer. Thoughts? Thanks! 
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