If you can clearly see the damage to a pond liner, it often seems too complicated to drain the entire pond in order to carry out the repair in the dry. You can find out here whether foils can also be glued under water and when this is possible.
PVC film can also be patched under water with the right adhesive
underwater glue
Some glues are also suitable for use under water. However, they can only be used for pond liners made of PVC. With other types of liner, you should definitely drain the pond before repairing the pond liner.
After the repair, you must also leave the garden pond empty for at least 1 - 2 days so that the repaired area can dry sufficiently.
When using the adhesives, pay particular attention to the following points:
- that they are specifically designed for underwater use
- that they are compatible with fish
- that they are designated as plant-compatible
tips
If you have PE foil in your pond, you should refrain from using it underwater. In principle, most PVC adhesives are also suitable for PE films, but the adhesive strength is often significantly weaker. In this case, it is better to drain the pond and repair it while it is dry.