What do you mean when you say " I disagree with you saying that it’s best to rehome the goldfish first then asking what you should put in it."? Im pretty sure if i want to suit there needs I cant keep three of them in a 40 gallon. They naturally grow up to a foot long or more kept in the right conditions. I dont want to stunt there growth. I only asked what i should do with them that is logical? And once i have i want to know what i can put in my tank