So this is frequently stated in threads, both fresh and salt and honestly I think it is kind of ridiculous unless you already have the upgraded tank in your possession. Why buy fish that will outgrow your tank, especially if you don't already have the future tank. Life doesn't always allow us to upgrade when we want to. And I'm not a fan of ill trade it in when it gets to big. Who knows what happens to it then. Most fish stores sell you a fish no matter what size but it's on you to understand that fishes needs. What are your opinions on this? I'd say I'm not a fan of buying and upgrading later or trading in