Pressure on the bottom of the pond figures in when there is 96" of water in the pond. It might leak out faster at full pool of 96" depth than it does with only 48" of water in it at full pool.

Then again, maybe not because the water table is higher. Like I said, you're going in uncharted territory.

BUT, I believe it would if you wanted to keep the pond at 96" depth when the water table is 48" below the surface vs. at the surface.


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