I remember walking past the pond and pausing. Not because anything dramatic happened, but because the water level looked slightly lower than I remembered. Not by much. Just enough to make me stare at it longer than usual. I told myself it was evaporation. Warm weather. Bit of wind. Normal. But then it happened again.
You start mentally marking the level like the pond is going to admit something if you watch it closely enough. It does not. It just keeps quietly dropping.
While trying to convince myself nothing was wrong, I ended up reading about Bedfordshire pond fibreglassing and came across the name of a company called That Pond Guy. They explained how leaks often go unnoticed for a long time because the signs are subtle at first. They also mentioned how the ground around the pond can slowly become saturated before the owner realizes what is happening. That detail stayed with me.
Signs that point to a leaking liner
Looking back, there were small clues I did not recognise at the time:
- Water drops even on cooler days
- Soil around one edge is feeling damp
- Plants near the pond are looking unusually healthy
- Topping up water is becoming more frequent
- A faint earthy smell that was not there before
It was not obvious. That is the tricky part.
Why leaks are so difficult to locate
Liners rarely tear in big, visible ways. It is usually something small:
- A sharp stone underneath pressing for years
- Roots slowly pushing against the material
- A stressed fold that weakens over time
- Sunlight makes the edges brittle
Because the liner sits loosely in the ground, water can travel beneath it before you ever see where it is escaping.
The temptation to patch and move on
My first instinct was to look for quick fixes. Patch kits. Sealants. Temporary solutions. And for a while, it seems fine. But if one part of the liner has started failing, other parts are probably aging too. You repair one area, and months later, another issue appears.

Each repair means draining the pond, disturbing the fish, and dealing with mud and mess.
Why do many pond owners choose relining or fibre-glassing
After reading more, it became clear why people stop chasing small leaks and instead redo the pond lining properly.
They often choose to:
- Remove the old liner completely
- Inspect and prepare the base correctly
- Install a high-quality liner with proper underlay
- Or switch to fibreglass for a permanent solid shell
Things I wish I had noticed sooner
The clues were there for months:
- Regular water top-ups becoming normal
- Edges of the liner looking worn
- Dirt collecting more heavily in folds
- A constant sense that something was not quite right
Leaks don’t announce themselves loudly. They develop slowly.
Final thoughts
If you find yourself staring at the water level and wondering whether it is lower than yesterday, trust that instinct. Observe carefully. Small changes often point to bigger issues underneath.
A leaking liner does not fail overnight. It gives quiet hints long before it becomes obvious.

