How to Repair a Leaky Concrete Pond
- 1). Remove all fish and aquatic life you wish to repopulate with a seine and/or dip net, depending on the size of the pond. Keep them in a holding tank until repairs are complete and they can be re-acclimated to the pond. Drain the pond using a submersible or in-line water pump. Remove all organic material from the pond basin so you have a smooth surface on which to install the liner.
- 2
Fish enjoy structure.fish image by Henryk Olszewski from Fotolia.com
Install the pond liner by laying it in the bottom of the pond. If the pond has a bottom drain, cut a hole in the bottom of the liner to expose the drain. The liner should lay over the edges of the pond by at least 1 foot. Lay down decorative stones to hold the liner in place. At this time, you might also add some fish structure in the pond by stacking several stones on top of one another. - 3). Spread a layer of Bentonite-based pond sealant over the pond liner for an extra tough seal. Apply between 1/4- to 3/4-inch thickness evenly distributed throughout the pond. Use a cup or granular spreader to achieve the proper layering.
- 4). Refill the pond with the submersible or in-line pump. As the water comes in contact with the Bentonite-based sealant, the individual granules will form a cohesive mat, completely sealing the bottom of the pond.
- 5). Restock the pond with the fish and other aquatic animals from the holding tank.
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