The North Central Regional Aquaculture Center has a sunfish culture guide that is available here.

http://www.ncrac.org/NR/rdonlyres/7BBF17EA-1CD1-411D-9F0B-723EABEF0E3E/49161/Sunfish_Culture.pdf

They mention pumpkinseeds a few times, but not much information.

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From Bob Lusk: Dr. Dave Willis passed away January 13, 2014. He continues to be a key part of our Pond Boss family...and always will be.