Hi Soapman, I agree with TomW.
I am a newbie, but if this person finds the best solutions to a larger than average hydro system, many people can benefit if the discussion is posted here.
The most important parameters to post immediately are elevation between proposed feedpond head and lowest point of pipe outlet, and lowest/highest monthly flow rate. Plus, the specific problems they are now encountering. Also, what are the output goals? (more questions to follow...)