for the most part its true but, they do have special needs to keep an eye on. they like a specific range of temps (different types have different ranges) so its a good idea to do a little research. you have to moniter their food intake. goldies are known for hogging all the food. if you are mixing corys and goldies, try to feed floating
and sinking food at the same time. your cories mainly eat from the bottom so, while the goldies are worrying about the floating food, your corys will be able to scramble around and get their share!
good luck with your corycats!