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Preparing Ponds for Winter

We are not alarmists at The Deck and Patio Company, but our job requires that we pay attention to credible weather forecasts. And according to Accuweather, the Northeast may be in for an extended snowy winter, stretching into spring of 2017. If you have a backyard pond, there are a few things you can do to get ready for this onslaught.

Pond Fish in Winter

First, let’s deal with the misconception that you can’t leave your fish in the pond during winter months. Actually fish do just fine in winter. They go dormant and hibernate. However, our pond expert, Bill Renter, does add that it’s well to be especially alert to their needs once water starts to freeze. Should ice, for example, completely cover your pond, the fish could become starved for oxygen.

“This can be remedied by ensuring the pond has at least two feet of water for them to swim in,” says Bill. “It’s also key for the water to remain oxygenated by keeping a little hole in the ice with a heater, bubbler, and an aerator. We use products from Aquascapes Inc. — pond experts from St. Charles, Illinois.”

Aquascapes’ designs manager, Gary Gronwick agrees it’s important to use a pond de-icer. “This will keep a little hole in the ice so gases can escape,” he says. “While some recommend boiling water to create an opening in frozen-over ponds, that should be discouraged. It will only ice up again quickly.“

Gronwick also says to avoid chopping or sawing the ice to open a hole. The noise and vibrations will stress out the hibernating fish to a point they could die.

These things done, Mother Nature will do the rest. The fish will spend the entire winter hibernating at the bottom of the pond, or in a cave designed for this, and then will slowly wake up as the water warms in the spring. The fish do not need to eat during this time and, in fact, shouldn’t be fed at all.

We’ve included in our photo captions below more tips on preparing your pond and fish for winter and how to watch over it all. Happy ponding.

Prepare Ponds in Fall for Winter:

Before winter sets in, carefully look over your plants and remove any dying material. These materials rot and build up poisonous gases that can’t escape through ice when it forms. Such conditions might mean the koi are no longer simply hibernating, but are in a dangerous state of torpor.

Pond Waterfalls in Winter: (Photo/Aquascapes Inc.)

Keeping any waterfalls running during cold months helps move the water so ice doesn’t form. But if ice builds up, pond aerators can put bubbles back in the water to add oxygen for the fish.

Contented Pond Fish in Winter: (Photo/Aquascapes Inc)

This pond has been cleared of excessive plant material and ice does not cover over the pond so the fish are happily hibernating.

Water Plants in Winter:

Hardy water lilies (shown here) that float on the water’s surface and have a short blooming period can withstand the cold winter months nicely. Lotuses also can withstand the cold winter months because they bloom in summer and go dormant in winter. Note that frost kills water hyacinths; water lettuce, which fights algae, should be wintered in a warm spot that is well lighted as they will not survive in the pond over winter.

Prepare Pond Fish for Winter:

To be on the safe side, take water temperature regularly once it hits 55 or lower. If your pond jewels are hungry and moving about and you haven’t fed them, they will find something in the pond to eat and soon will be dormant anyway.

Pond Caves for Fish:

Ask your pond designer/builder to create a small cave, or caves, where the fish can hide from predators in warm weather, and where they can also lie dormant during the winter months. Caves are easily made from the way rocks are positioned in and around the pond.

By June Sullivan|2017-01-21T16:34:29-05:00November 3rd, 2016|Ask the Experts, Backyard Escapes, Koi Ponds, Living Landscapes, outdoor maintenance, Plantings/Pondscapes, Ponds & Water Features, Seasonal Landscapes|1 Comment

Keeping Pond Fish Safe and Healthy in Winter
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Keeping Pond Fish Safe and Healthy in Winter

Updated 11-30-23

Fall Backyard Maintenance:

If you’ve seen to fall maintenance for your pond already, you’re on your way to ensuring a safe and healthy pond in winter. By fall maintenance, we’re referring to cleaning the skimmer basket, trimming any dead or dying foliage, preparing your waterlilies for winter, etc.

And you also need to add cold water bacteria to help keep the water clean and clear.

Getting Ready for Winter

It is a common myth that you can’t leave your pond fish outside once the cold sets in. Actually, fish do just fine during winter. That said, Deck and Patio’s own Dave Stockwell does caution to be alert. When ice covers the pond, the fish might not be getting enough oxygen.

This can be remedied as long as you give them:

two feet of water to swim in,
oxygenate the water,
and keep a hole in the ice with a heater, bubbler and an aerator. This allows the naturally produced gasses to escape from under the ice.

If the above efforts fail to keep it from freezing, Aquascapes Inc. designs manager suggests using a pond de-icer. “This will keep a little hole in the ice so gases can escape,” he says. “While some recommend boiling water to create an opening in frozen-over ponds, that should be discouraged. It will only ice up again quickly.“

Gronwick also says to avoid chopping or sawing the ice to open a hole. The noise and vibrations will stress out the hibernating fish to a point they could die.

That done, Mother Nature will do the rest. The fish will spend the entire winter hibernating at the bottom of the pond, or in a cave designed for this, and then will slowly wake up as the water warms in the spring. The fish do not need to eat during this time and, in fact, shouldn’t be fed at all.

Prepare Ponds in Fall for Winter:

As mentioned above, before winter sets in, fall maintenance is important. For example, carefully look over your plant material and remove dying plant material. These materials rot and build up poisonous gases that can’t escape through ice when it forms. Such conditions might mean the koi are no longer simply hibernating, but are in a dangerous state of torpor.

Pond Waterfalls in Winter: (Photo/Aquascapes Inc.)

Keeping any waterfalls running during cold months helps move the water so ice doesn’t form. But if ice builds up, pond aerators can put bubbles back in the water to add oxygen for the fish.

Contented Pond Fish in Winter: (Photo/Aquascapes Inc)

This pond has been cleared of excessive plant material and ice does not cover over the pond so that the fish are happily hibernating.

Aquatic Plants in Winter:

Prepare Pond Fish for Winter:

Pond Caves for Fish:

Ask your pond designer/builder to create a small cave, or caves, where the fish can hide and also lay dormant during the winter months. Caves are easily made from the way rocks are positioned in and around the pond.

If you have any questions, or require assistance in preparing your pond for winter, give us a call:

631-549-8100

By June Sullivan|2023-11-30T14:52:06-05:00November 13th, 2014|Backyard Escapes, Koi Ponds, Landscaping, Living Landscapes, Ponds & Water Features, Uncategorized|1 Comment

Falling Leaves, Feeding Koi, and Other Pond Tips
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Falling Leaves, Feeding Koi, and Other Pond Tips

Plants and Falling Leaves

“If you want to greatly diminish spring pond maintenance,” says Bill Renter, Deck and Patio’s Outdoor Living Expert, “now is the time to take a few steps to prevent too much debris from accumulating before winter sets in.”

Falling Leaves Affect Pond Ecosystems:

To get some tips on how to protect our ponds, pond expert Dave Kelly at Aquascapes Inc. (St. Charles, IL) offers this advice:

“The best idea is to put up pond netting before the leaves fall,” he says. “But if you didn’t do that in time, you can use a long-handle pond net to scoop down to the bottom and pull out leaves and other debris.”

Ideally, put your net in place before leaves begin falling. Then, simply pull it out when they’ve all dropped. You can tent the net so it doesn’t sag into the pond when it gets weighted with leaves, say experts at Aquascape Inc.

Value of Pond Netting: (Photo: Aquascape, Inc.)

Pond netting is only needed for a short time and will save you countless hours come spring. Ideally, put your net in place before leaves begin falling. Then, simply pull it out when they’ve all dropped. You can tent the net so it doesn’t sag into the pond when it gets weighted with leaves, say experts at Aquascape Inc.

Kelly also suggests trimming back and removing dead foliage from aquatic plants to help remove excessive organic material that would otherwise decompose in the water feature.

Caring for Pond Lilies in Fall:

Pond lilies are idyllic water plants. However, during early Fall, it’s a good idea to cut them back to just about the base of the plant; also trim back any marginal plants that might eventually droop over into the water.

Unwanted Pond Debris: (Photo: Aquascape, Inc.)

Since some debris will make it into your pond no matter how hard you work, Aquascape recommends adding a cold water bacteria treatment, which has concentrated strains of beneficial bacteria that works well below 50 degrees (F). Dave Kelly recommends adding it routinely to help maintain water clarity and quality.

Caring for Pond Fish in Fall

You can — and should — plump up your darlings to survive winter hibernation, by gradually increasing how much you feed the as temperatures start to drop. When pond water gets below 59 degrees, use fish food made for cold water. As the temperature continues to drop, gradually reduce the amount you feed them.

Once temperatures go below 55 degrees, says Dave Kelly, the metabolisms of pond fish slow way down. And when pond water gets down to 50 degrees, do not feed the fish any more. Their systems shut down in the colder water, and food sits inside them and rots. They get very sick and diseased from this.