I am really intrigued by large fish with personality and everyone seems to point to the Oscar as having the most personality, I could spend 300-500$ and get a 75 gallon tank to set up for just a single one but is it really worth it or should I just opt for some schooling fish in a small tank instead? Someone on youtube commented and said keeping them is unethical as they get far too big and put a strain on any filtration system and should be left alone in the wild. What do you think?