It's a good idea to have redundant pumps (need a check valve on each one, incase it does shut down)

3 things to consider....

1- how high do you need to pump ? (head)
2- how many gallons is your fish tank ?
rule of thumb....you want to move the fish tank's water twice an hour
3- wattage...better quality pumps use less electric.
The higher it pumps, the more watts. The wattages given, are normally at '0' head, unless
otherwise noted .

The pump you listed says at 5 ft of head it pumps 3000 gals ....so if your tank isn't higher then 5 ft and it's aprox 1500 gallons, this pump might be ok.

Most pumps have a 'performance curve chart'...it shows how much water it will pump at a given head.
You may have already seen it (?) They show the chart for this pump, if you click on 'view more images' and go to the 2nd page.

I oversize my supply pipes.....uses slightly less electric( less presure) and eventually you'll lose a little flow, do to bio film build up

Good luck...hope this helps some. Hopefully some others will point out some things too.