Tom welcome to the PB forum. We have a number of Calif. members who should pick up on your request. There is an unbelievable amount of info here and a lot of very talented pond managers. Here is a link to some info on Calif. providers. I don't know if they are good choices but it has some info . But first a link to :

FARM FISH POND MANAGEMENT IN CALIFORNIA

http://www.dfg.ca.gov/fishing/assets/documents/InfoLeaflets/No_23.pdf

UC-Davis

http://aqua.ucdavis.edu/links/links01nf.html

Here is a link to the Western Region Aquanic chapter.

http://www.fish.washington.edu/wrac/

Call the PB office and get a copy of Basic Pond Management to get started.