right. so as for now there will be 7 severums, a molly, and a gudgeon in a 50gallon tank. he wants to add a texas. granted most the severums are small and if he puts a small texas in there it could last for maybe 3 months. severums grow pretty quickly. i've never owned a texas but since its a cichlid i imagine they would grow just a quickly.
if your growing them out i'd wait till you move the 3smaller sevs to your friends tank before you add anything else