I see no problems IF the pond was holding water to your satisfaction previously. It'll probably settle over time and you might have to add more dirt. Will you be compacting that dirt in any way as it's being placed?

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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).