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neander20

What can I use as a sealer for waterfall leaks?

Un Safe
6 years ago
last modified: 6 years ago

After much work (and help from people in this forum), my very small pond looks great but still the water level goes down several inches a day (but only when the pump/waterfall is on, proving that the liner itself isn't leaking). We have liner behind the rocks, as suggested. We also have a ton of the expanding foam in between the rocks. We're now looking for some kind of transparent sealer to paint all over the waterfall rocks. Urethane would drip into the water and kill my little goldfish and be a terrible mess. Any suggestions for what to do at this point?

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