If I was building a pond, I would make durn sure I could run a sheepsfoot roller over the bottom, compacting it, adding 6"-8" of clay, re-compacting it with the sheepsfoot roller and doing it again 2-3 more times for a total of 4 layers compacted and knitted together.

That means cleaning out the pond bottom first.....

Take a look at a bathtub. It holds water Very, Very well, providing that the plug is in the drain. You don't want to build the pond, stock fish, etc., and realize that you didn't put the plug in the drain.........


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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).