Hello all, I am planning out my first setup and grow. I plan on having 1 inch feed lines and 2 inch return lines to the mother tote. I figure I will have about 50 gallons in the system. What size water pump should I use? I originally planned doing half inch feeds and 1 inch returns with a 400 gph pump so I'm thinking I should get at least an 800gph or a 1000gph. Let me know what you think. Thanks.