Holes are an inevitable part of plastic pond ownership. While many pond owners hire experts to repair their ponds, this maintenance task can be done at home. When done correctly and with the proper materials, the pond will be as good as new with absolutely no leakage from the repair site.
Drain the pond to below the hole. Remove any fish that may be adversely affected by the lower water depth.
Thoroughly wash the area around the hole with naptha soap and an abrasive sponge. The plastic should be completely cleaned before continuing.
Dry the entire area completely with the paper towels. Any dampness will cause the patching tape to fail.
Measure the hole, allowing a 1-inch margin completely around the damaged area. Cut the necessary size of patching tape and apply the tape to the area. Press the tape down firmly with a roller to remove any air bubbles and promote bonding.
Cover the edges of the patch with lap sealant to increase the waterproofness and life of the patch. Allow the patch to dry for at least 24 hours before refilling the pond. This will ensure the entire sealant is dry and bonded.