Just because you kept a Oscar in a 55g for life or when it was around or over 12" doesen't mean it was the right thing to do. You can be kept in a closet, but would you be happy or be abled to move around easily, absolutly not. Keeping an Oscar in a 55g for life is like keeping a Great Dane or a Bull Mastif in a 8x5 dog run. It can be done, but is it right.....no. In the end it is your fish, but if you want to do the right thing and keep it
humainly then go 75g or more.
So sorry guys, I have do dissagree with you. Keeping an oscar in a 55g for life or any fish that gets over 11" for that matter is on the
cruel side. Definently not fair on the fish as it is
your responsibility as a pet owner to research and find out what the animals needs are "before" getting it. That goes for all animals/pets. If you can't provide the proper housing or care, then you need to go with something else.
Again, you can get a 75g-150g cheaper used off craigslist.com with stand and all then you can get a 55g new with stand. You just have to be patient. I just got a 135g stand, canopy, and with tons of extras just because they found out I was military. Not to mention the countless 55g-75g's I have seen up for free because they just wanted to get rid of them. Be patient and watch craigs. You have plenty of time with him being only 3".