We went thru almost the same scenario a while ago. Here's that thread. I'll bet a number of your questions will be answered if you read it.

http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=196000&page=1

www.hoosierpondpros.com

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).