Water Pump for 72 Gal Tank

[amfsff]

Greetings and thanks for the help. My cousin gave me a 72 gallon bowfront tank with an overflow and what appears to be a 15 gallon oceanic sump. I need a water pump for the sump. From the bottom of the sump to the top of the overflow looks like 5 feet. What size pump do I need and how many GPH is necessary? I'll be using it for freshwater.

Thanks.


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