generally speaking 5-10 times the volume of the aquarium is considered a good turn over , however it has been my experience that pump ratings are optimistic at best .
also , why make your sump in the basement and pump that water 12 feet up , that takes a lot of power and $$.
i made my sumps right under the tank with an overflow to the waste in the basement so there can never be a flood in the living room .
my 2 c'
BTW i used grundfoss 3 speed circulating pumps ,....quiet and use little current .