Yes, you will need a feed pump that can give you 1.5x2 times your water volume but not lower than 600gph or exceeding 800gph.
On a different subject, your tank may be too small for that skimmer. Even in a heavily stocked aquarium, this skimmer needs at least 200 gallons tank (not including sump) to work correctly. Anything below that will not be able to produce enough organics to make the skimmer work correctly. You will likely experience periods when the skimmer collects great followed by periods when the skimmer does not collect anything at all.