Shape doesn't matter, unless you are building bigger and want to incorporate humps, channels, etc. in the pond.

Carrying capacity will depend on water quality, aeration, feeding, etc. http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=92440#Post92440


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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).