Hi I have two fifty year old red ears. Me and sister got them 50 years ago. They were about 3 weeks old, paid 25 cents each.
one male, one female.
I got them in a 100 gallon tank, with two pond type pressure tank bio filters.
i keep them separated by a screen as they fight,
I posted in the care section as the males shell is turning yellow after a bout with fungus ( white fungus rot on shell) white fungus is gone, but shell is yellow