I have a six inch diameter well, the depth is 600 feet, I have 580 feet of water in well, the well is putting out ten gallons of water per minute, now the question is what size submersible pump should I use, someone said pump from depth of 400 ft., what size pump should I use, 1 hp, or larger, I will be pumping directly in my 3/4 acre pond, will I need a tank, or can I pump with just the pump and no extras, any help will be gladly appreciated, these pump sizes are blowing my mind, need help.