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I was out at my pond today and it is still partially covered with ice. I have a de-icer and aeration – isn’t that enough to keep the ice off my pond? | Decorative Ponds & Water Gardens Q & A

Q: I was out at my pond today and it is still partially covered with ice. I have a de-icer and aeration – isn’t that enough to keep the ice off my pond?

Q: I was out at my pond today and it is still partially covered with ice. I have a de-icer and aeration – isn’t that enough to keep the ice off my pond?

Mark – Buffalo, NY

A: During these frigid months of the year, a hole in the ice means the difference between life and death for your pond fish. That opening allows oxygen to flow into the liquid water while it dissipates harmful gases caused by decaying debris and fish waste into the air.

Bubblers and de-icers both keep a hole open in the ice, but they go about it differently.

  • Bubblers, like the ones found in Airmax® PondAir™ Aeration Kits, are designed to gently and quietly move the water surface, and that action keeps a hole open in the ice. The aerator also delivers oxygen to the lower levels in your pond while bringing harmful gases to the surface to be released.
  • De-icers, such as the Thermo-Pond De-icer, melt surface-forming ice and create a gas exchange vent in the ice. While effective, during cold windy nights they may not be be enough to keep a hole open on their own.
  • Bubbler-De-icer Combos, like Airmax® PondAir™/Thermo-Pond De-icer Combo, is an energy-efficient option. Because the aerator will bring harmful gases to the surface and your de-icer helps to keep the hole melted, you’ll be sure to keep the ice vent open.

The bubblers, de-icers and combos are not designed to warm the water or keep the entire pond surface ice free. They’re meant to keep an opening for gas exchange, which is all that’s needed for the fish in your pond.

As long as the equipment you have in the pond is sized correctly (see your manual for details on what yours can effectively handle), you won’t need a larger hole. Your fish are less active, not eating and producing less waste, and so they won’t have the gas exchange requirements they do in the warmer months.

If your vent does freeze over during extra cold temperatures, simply pour hot water on the ice where the hole once was. It’ll melt the hole back open – and your fish can breathe a sigh of relief!

Pond Talk: How do you keep a hole in the ice in your water garden?

Keep Your Fish Safe - Airmax® PondAir™ & Thermo-Pond 3.0 De-Icer Combo

We’ve had a pretty hard winter. What can I expect when the ice finally melts? | Ponds & Lakes Q&A

Q: We’ve had a pretty hard winter. What can I expect when the ice finally melts?

Q: We’ve had a pretty hard winter. What can I expect when the ice finally melts?

Kevin – Downers Grove, IL

A: Yep, this has indeed been a long, cold winter for much of the country. We’ve shivered through frigid temperatures, shoveled and slogged through snow banks, and watched our ponds and lakes freeze over.

Unfortunately, that could mean trouble for your fish.

When the ice on your pond finally melts this spring, you might discover that your fish and other aquatic life haven’t survived the season. These winter fish kills occur when the ice prevents gas exchange and reduces the amount of dissolved oxygen in the water.

Michigan DNR fish production manager Gary Whelan says that shallow lakes, ponds and streams are particularly vulnerable to winterkill.

“Winterkill begins with distressed fish gasping for air at holes in the ice and often ends with large numbers of dead fish that bloat as the water warms in early spring,” he explains. “Dead fish and other aquatic life may appear fuzzy because of secondary infection by fungus, but the fungus was not the cause of death. The fish actually suffocated from a lack of dissolved oxygen from decaying plants and other dead aquatic animals under the ice.”

You can’t bring your fish back to life, but you can prevent winterkill from happening in the future by aerating your pond year-round with an Airmax® Pond Series™ Aeration System. Here’s how it works:

  • It reduces the amount of decomposing debris in the pond, encouraging the colonization of beneficial aerobic bacteria, which prevents muck and nutrient accumulation and maintains clear water.
  • It keeps an air hole open in the ice, allowing harmful gases to escape while delivering fresh oxygen to your fish.
  • It pumps even more fresh oxygen into the water via diffusers that sit on the bottom of the pond.

A little pond preparation can go a long way, especially when it comes to unknown variables like weather. Let’s hope next winter is milder than this one was!

Pond Talk: Have you experienced a winterkill in your pond or lake before?

Airmax(r) Aeration is Easy to Install - Airmax(r) Pond Series(t)

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