Pacus and oscars don't go in the 320 gallon forever. They will go to a pond when they outgrow. A hobby doesn't have a age limit. You do it as a passion. Even if i study i need to get my dad to do it. I can't sell it back as the guy had the ray in a 30 gallon tank and does a 10 percent water change every month. I know he will die soon. I never said it is okay that i am just a kid. I am saying i have no power over money. I can do water changes, do the feeding, and try to take care of them. When i researched i find that rays can go with any aros even Jardinis and their aggression. They are doing fine now and please no more criticism.