Beginner in need of some advice

[Faithinc]

So I've got 1 return pipe with a 90 directed down into the over-flow (Like Beananimals) and the second 90 is pointing upwards (again like bean-animal).

So I've got my over-flow drainage and my over-flow protection, both will drain down into the sump. For the return then... with 3 elbows and 4 foot of head back into the tank, I would require a 600+ gps return pump... is that correct?