I heard goldfish die easily. But what I'm trying to accomplish is letting people know they can add a little more. I don't want people thinking, hey I can only add
a little guppy in 3 gallons. And I already have a 1 gallon, soon to upgrade to a 5 gallon.
You don't need to give anyone this garbage advice. The 1" per gallon rule is bull because they need a lot MORE space than that. You shouldnt put ANY fish in a one gallon. I have a 36 gallon with 6 1" fish! I feel sorry for your poor fish.