Replacing a pond liner in a natural swimming pond without draining the entire pond is possible, but it’s a bit tricky and requires careful planning. You’d need to isolate the section of the pond where the liner needs to be replaced, often by creating a temporary barrier or using a pump to keep water out of that area. It’s important to keep the rest of the pond stable, so the fish, plants, and beneficial bacteria aren’t disrupted.
You’ll then carefully remove the damaged liner and replace it with a new one, making sure the new liner fits properly and doesn’t disturb the water level too much. It’s a delicate process, and it can be hard to do alone, so having some help can make things easier.