You can’t be a stubborn aquarium hobbyists. Well, I guess you could, but it won’t get you anywhere and you’ll constantly be disappointed. Sometimes things can’t be forced and you have to know when to give up and try something else. For example, your favorite fish might be one that is notoriously difficult to maintain in captivity. You try your hand at it a few times, each one ending in the fish’s demise. Instead of going back to that same fish three or four times, try something different. Sometimes fish of similar color (aka a suitable substitute) are easier to care for and will make your life a lot simpler.