Pond Boss Forums Thread Like Summary - pond leak

We have an old pond on our property that we cleaned up last spring. Even though we used a layer of clay there's one sandy spot that is leaking. Can we use polymer while it's dry?

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Yes, using the stuff that TJ has, incorporate it in the top 6" of the soil. How big of an area is it?

Fill from an outside water source, (well, surface run off, etc. ) don't rely on ground water to fill it. Ground water coming in through that area will push it out and the pond won't seal.

Where in Indiana?

Those leaks don’t seal themselves

When clay dries up it cracks and doesn't heal itself. It can be sealed with dry clay, even sandy clay and add an amendment that allows it to pull back together when rehydrated, but you may not have that specific product available in your area.
For TJ's product to work "best", the pond needs to be full per his recommendations, for max hydrostatic pressure. For any amendment to work, soil has to be 22-28% moisture, it has to be properly compacted and filled before it dries much.