HI! TO EVERYBODY I'M BUILDING A SUMP AND I NEED TO KNOW HOW MANY GALLONS PER HOUR WILL WORK BETTER FOR MY 75GAL ALSO WHAT SIZE OF PUMP FOR THE RETUR LINE 'IM RUNING MY SUMP IN THE BASEMANT SO I WILL NEED SOMETHING THAT PULL SOME GOOD AMOUNT OF WATER , I WAS THINKING OF GETTING A 600GPH OVERFLOW...