Go the site you linked (Drs.F&S) lookup the pump and cliick on more information. You'll find a chart for flow rates that shows this model has about 590 gph
at 6' head height.
I'm assuming you want this as a return pump from a sump or similar. In that case you need to match the pump output to the overflow. If this is a pre-drilled reef ready tank with two overflows (e.g. AGA 125RR) the overflows are probably rated at 600gph each. This pump would be fine, though you could go larger.