Joe:

Most of the corn feeders aren't directional, so unless you have access to a boat and some sort of a tripod to mount them above the water, the won't get all the feed to the water. I tried one cheap directional feeder, but with the raccoons here, they made quick work of the rubber impeller. I went with a Stren ADF75, and it's worked well for me.

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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).