Q: Do I need to watch the water levels in my pond during the winter?
Paul – Wixom, MI
A: Even when winter’s chilly grip takes hold, your pond’s water level will still fluctuate. It likely won’t be as dramatic as summertime’s evaporation rates, but you should definitely keep an eye on the amount of liquid stuff in your pond throughout the cold months.
Causes of Winter Water Loss
During the summer, the sun’s warming rays heat the water in your pond and cause it to evaporate—and sometimes very quickly, depending on how warm the air and water temperatures get. But during the wintertime, water loss can be caused by:
- Dry air: Low humidity—which is when the air contains little water vapor—can increase evaporation rates as the dry air will absorb the moisture from your pond.
- Winds: Windy conditions can also escalate evaporation in your pond. A 5-mile-per-hour wind at your pond’s surface, for instance, results in roughly three times the rate of evaporation on a still day.
- Ice expansion, formation: The liquid water will appear to dissipate in your pond as ice forms and expands.
A small amount of water level fluctuation is OK—but a few inches of water loss could leave your fish in ice, particularly if your pond isn’t that deep to begin with!
Keep It Topped Off
To keep water levels steady (and your fish thawed and happy), you don’t need to warm the water. Instead, you should plan to top off the pond when it dips more than an inch or two, just as you would during the spring and summer.
When you add water to your water garden, make sure it actually goes into the pond—not just on top of the ice. Feed the water through a hole in the ice using a garden hose or a thermostatically controlled hose such as the K&H™ PVC ThermoHose™, which prevents ice from forming in your faucet or hose. The unit’s built-in heating elements turn on automatically when temperatures dip below freezing so you’ll have liquid water coming out of your hose.
If you need to put a hole in the ice that’s on your pond, remember to never bust through it with a drill, hammer or other blunt object as the subsurface vibrations could harm your fish. Fill a bucket with hot water and pour it on one area of the pond to melt open a hole, preferably near the edge.
Pond Talk: How often do you need to top off the water in your pond or water garden during the winter?