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Can I Break A Hole Open In The Ice Over My Pond? | Decorative Ponds & Water Gardens Q & A

Can sidewalk salt be used to melt the ice off my pond?

Can I Break A Hole Open In The Ice Over My Pond?

Liz - Carterville, IL

When maintaining a pond during the winter, it is important that the surface of your pond does not freeze over with ice. If you have an aeration kit running in your pond but the resulting hole in the ice is getting smaller, or has closed up altogether, don’t panic. Sporadic short-term ice coverage is not an issue if you’ve done regular maintenance to reduce organic debris throughout the season. If the pond remains iced-over for weeks at a time, consider giving your aeration system a boost.

If your pond has frozen over and you want to reopen the hole, simply rest a pan of hot water on the surface of your pond to melt the ice away. Do not use a blunt object to break the ice open as the shock-waves will stress your fish. Also, refrain from poking holes in the ice as you may accidentally puncture your liner or poke one of your fish.

Another way to maintain an open ventilation hole is by adding a pond heater/de-icer above your aeration diffuser stone. If you have multiple air stones, gather them into one area to make it more difficult for ice to form.

Pond Talk: Do you notice the ventilation hole getting smaller or freezing over for short period of time in the winter?

What Is A Winter Fish Kill & Why Do They Happen? | Ponds & Lakes Q&A

What Is A Winter Fish Kill & Why Do They Happen?I’ve heard the term “winter fish kill.” What is it and why does it happen?

Linda - Stockbridge, MI

A winter fish kill occurs when your pond or lake becomes uninhabitable for aquatic life and a large number of fish pass away. Winter is the most common time for a fish kill because the long, harsh conditions of the season deplete the oxygen content of the water.

Prolonged ice cover on your pond or lake seals off the water from the air and prevents oxygenation of the water. Ice and snow cover also prevent sunlight from reaching your pond plants. Pond plants normally produce extra oxygen for your pond via photosynthesis. Finally, decomposing organic matter in your pond releases toxic gases that can’t escape from under the ice.

Eventually the competition for the limited supply of oxygen in the pond becomes too great. The fish suffocate and a winter fish kill occurs.

The good news is that winter fish kills are preventable. There are many things you can do as a pond and lake owner to maintain proper oxygen levels in your pond. First and foremost, invest in a good Aeration System. Aeration is the process of circulating air through water and it’s critical for overall pond health.  A second option is to add beneficial bacteria products like MuckAway™ or PondClear™ to your pond or lake before the winter season. Beneficial bacteria digest accumulated decomposing organic matter in your pond and convert it to a harmless, odorless gas.

Pond Talk: What fish behavior may indicate low oxygen levels in your pond?

Airmax® Aeration Systems

My pond isn’t frozen yet, but I can’t see my fish. Are they okay? | Ponds & Lakes Q&A

My pond isn’t frozen yet, but I can’t see my fish. Are they okay?

My pond isn’t frozen yet, but I can’t see my fish. Are they okay?
Stephanie – Harpursville, NY

Fish are survivors. And when the water starts getting cold, they head for deeper waters, where the chilling effects of winter air are less pronounced. Provided there’s adequate aeration, your fish will likely linger at the bottom throughout the colder months. As a result, they’ll be much less visible – but the odds are extremely good they’re doing just fine.

In order to ensure there’s sufficient oxygen for the winter, some people opt to keep their aeration systems active all year ‘round. At the very least, though, it’s important to maintain a vent hole when – or if – your pond ices over. The vent hole allows harmful decomposition gases to escape, allowing fish to winter safely. And because their metabolism slows during the winter months, a properly vented pond will likely have sufficient oxygen to ensure the survival of your fish until springtime.

Fish, it turns out, are extremely resilient. After wintering in the lower reaches of your pond, your fish will gradually return to the upper levels once water temperatures start to rise. In general, it’s probably a good sign when fish become less visible. If they’re struggling, it’s far more likely you’d see them at the edges of your pond. So while you might miss them, your invisible fish are probably doing just fine.

Pond Talk: Have you noticed less fish movement in your pond recently?

The de-icer I purchased says it’s thermostatically-controlled. Why is it always running? | Decorative Ponds & Water Gardens Q & A

The de-icer I purchased says it’s thermostatically-controlled. Why is it always running?

The de-icer I purchased says it’s thermostatically-controlled. Why is it always running?
Bill – White Lake, MI

When backyard water features are home to year-round populations of fish, it’s vitally important to prevent long-term ice cover. Without a break in the ice, harmful gases produced by decaying leaves and other organic matter build up, threatening the well-being of wintering fish. To prevent that threat, many pond owners install thermostatically-controlled de-icers, which produce enough concentrated heat to keep a vent hole open during winter’s coldest months.

When a de-icer is thermostatically controlled, it is set to turn both on and off at certain temperatures. In theory, that makes good sense: if the water is cold, the de-icer goes to work, and when the water warms, it switches off – saving on unnecessary electricity costs. The problem, however, is that the water temperature in a frozen pond may not rise above the thermostat’s high-temperature shutoff threshold, leaving the de-icer in full heating mode all the time.

Naturally, we’ve given this issue some thought. And that’s why we strongly recommend the use of our Thermo Cube® Thermostatically Activated Plug. Unlike a thermostatically-controlled de-icer, the Thermo Cube® measures air – not water temperature. Thus, when the sun is shining, and air temperatures warm up, the Thermo Cube® automatically cuts power to the de-icer, and turns it back on when the air temperature drops. The combination works flawlessly – applying heat when it’s required to keep the ice open, and shutting it off when it’s not.

Pond Talk: Do you use a thermocube along with your de-icer?

Thermo Cube® Thermostatically Activated Plug

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