Looks like its pretty happy. Eventually it might need to have more space but hey....you are the owner and can tell us what is going on with your fish. Truthfully, everyone wants to be the macho fish guy but in the end it cost money....I think realistically, if a person take good care of their fish, diet, water changes, filtration, etc. and the fish seems like its doing fine then its better then what most are doing. I seen large 30 inch aro's in 55 gallon tanks, not saying its a good thing by all means just....its better then most....just wanted to say responsible fish keeping is a must with these fish....hopefully we all do what we can, or what is best for the fish in the long run.