Ok guys I have got a question here that I hope you can help me out here with a little info. I got a area that is 195'x34'x195x52. It's not quite square. I am wondering on what size pump do i need to get? I have done irrigation on city water supply before but not one from a lake. I have read that you design the system first and then get a pump to fit the amount of water I need to flow. So If I am wanting to flow say 12 GPM do I get a pump to flow just that amount or do I add over kill to it? I have also got a hill of about 9 feet that I will have to push the water up to also. If you need more info let me know cause any help is better than no help.