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Can Aquatic Weeds Go Dormant? | Ponds & Lakes Q&A

Q:Will my fountain be enough to keep my fish safe this winter?

Q: Can Aquatic Weeds Go Dormant?

Jackie – Kalamazoo, MI

A: Yes, those insidious aquatic weeds can go dormant in the cold season, lying in wait in your lake’s muck and sediment, until spring when the hours of sunlight and temperatures increase. The good news is that you can battle them – even in their overwintering state. Here’s how.

Growth Patterns

When temperatures drop and the sun hovers lower in the sky, you’ll start to see those aquatic weeds retreat and hole up for the winter. The duration of their dormancy will depend on where you live (the weed growth patterns in a California pond, for instance, will differ from those in a Minnesota pond!). But, in general, you can expect to see different pond weeds disappear and reappear at different times of year based on environmental temperatures.

If your pond or lake freezes over, the perennial weeds will typically die back in the winter and re-emerge in the spring. Some plants, however, will continue to grow throughout the cold season, though at a much slower rate than you’d see in the warmer summer months.

Controlling Winter Weeds

Because you’ll probably see little to no greenery growing, it will be a challenge to control winter weeds. Methods that work in the spring and summer – like treating with temperature-sensitive herbicides and algaecides – won’t work in the colder temperatures. So what can you do? Here’s what we recommend:

  • Remove Weeds: If there’s no ice on your pond, you can pull on your hip waders and manually remove the weeds with a Weed Raker. This go-to tool efficiently pulls out aquatic weeds by their roots, slowing their regrowth, and also removes decaying matter.
  • Pond Dye: Pond Dye, available in convenient liquid quarts, will shade the water blue or black and reduce the amount of sunlight reaching the weeds and algae growing at the bottom of your lake. Less sunlight means fewer weeds, regardless of the temperature or time of year.
  • Aerate the Water: If you’re not using your lake as an ice rink, crank on your Airmax® Aeration System. The action created by the aerator will circulate the water and reduce the muck buildup throughout the winter.
  • Feeding Fish: Your fish will enter into a semi-dormant state when the water dips below 50 degrees, so there’s no need to feed them. Doing so will add to the lake’s nutrient load (i.e. weed fertilizer …), which is not what you want to do.

If wintertime weeds are taking over your pond, consider trying some of these time-tested tricks. They’ll minimize the nuisance growth during the cold season and reduce the amount of work you’ll need to do in the spring.

Pond Talk: How do you handle aquatic weeds in the wintertime?

Shade & Protect Your Pond - Pond Logic® Pond Dye

When do koi go dormant? | Decorative Ponds & Water Gardens Q & A

Q: When do koi go dormant?

Q: When do koi go dormant?

Helen – Minneapolis, MN

A: With winter officially starting in just one week, the cold weather is settling in across the country. Since your fish don’t have miniature submerged Koi calendars to check, what is it that tells your fish it is time to hibernate?

Koi are cold-blooded creatures, which means their body temperatures and activity levels are directly correlated with the ambient temperature. Koi are active and alert when their environment is warm and will start to slow down as the water temperature decreases. Once the water temperatures start to dip below 46°F your fish tend to stop eating and will retreat to the bottom of the pond. Your fish use the decrease in temperature along with the shortening day lengths as a trigger to prepare for winter.

As the water begins to cool, your fish will become less active as their bodily functions slow down. Less activity means a slower digestive process, less demand for food. It is this decrease in food digestion that warrants the use of wheat germ based foods like Pond Logic® Spring & Fall Fish Food. These types of food are easier to digest that regular food reducing the risk of leaving undigested food to rot inside a dormant fish, which can potentially be fatal.

As the temperatures continue to decline towards 40°F, the blood flow and respiratory rate of the fish will drop to an extremely low rate where their body is hardly functioning. You may hear people say that your Koi are sleeping in the winter and while fish do sleep this goes way beyond the standard drop in bodily functions associated with some much needed shut-eye. This extreme internal slow down ensure survival with even the most limited resources with cases of dormant fish lasting 150 days without food.

The whole over-wintering scenario sounds a little extreme to us but it is truly a natural and normal process for your fish. They do not require much attention in the winter but there are a few things you can do to ensure their winter break is a success. When a layer of ice begins to form over the pond, maintain an opening for gas exchange using an aeration kit or pond de-icer, like the PondAir™ & Thermo-Pond Combo.

Pond Talk: What do you do to help your fish through the winter season?

Vent Harmful Gases All Winter Long - Airmax® PondAir™ & Thermo-Pond 3.0 De-Icer Combo

How to Make an Ice Rink on Your Pond – Part 3 | Ponds & Lakes Q&A

How to Make an Ice Rink on Your Pond - Part 3

How to Make an Ice Rink on Your Pond

Part 3: Maintaining Your Ice Rink

Congratulations! If you’ve followed our series on how to make an ice rink on your pond, you’re well on your way to creating a winter-sports wonderland for you and your family. Your rink will provide hours of entertainment all season long – as long as you keep it maintained.

How do you keep your rink glassy smooth? You don’t need a Zamboni, but you do need to do some regular scraping, sweeping and flooding to resurface and prime the ice. Here’s our three-step solution for maintaining a perfect surface on your rink.

Step 1: Clear the Surface

First, clear the entire surface of the ice with a broom, a flat head metal shovel and ice scraper. Sweep and shovel off the snow, and scrape down and remove all bits of ice and snow as they will freeze during the flooding process and create imperfections on the surface. Dips and holes are OK because they’ll fill with water, but lumps and bumps are not.

Step 2: Flood the Rink

Next, flood the rink with water. Rather than use a sprayer nozzle, which can cause a pitted and rough ice from all the water droplets hitting the surface, let the water flow directly from the hose and allow it to evenly cover the entire rink.If possible, use warm water to flood the area. Just like in a Zamboni, the warm water melts the surface of ice, correcting imperfections and allowing it to freeze smoothly. You can either fill buckets with warm water from your bathtub and slowly pour the water over the ice, or you can use an outdoor faucet with a thermostatically controlled hose, like a Thermo-Hose™, to keep water flowing out to the pond.

Step 3: Use When Cold.

With your rink resurfaced and smoother than a pane of glass, you want to keep it that way, right? Before you cut into the ice with your blades, consider the temperatures outside. Avoid using the rink during mild weather when your skates do significant damage to the ice. Instead, use the rink when it’s cold enough outside to keep that slick surface intact.

Skate Away!

Now that you’ve learned how to grow good ice rink ice, how to set up and create a winter wonderland, and how to maintain the rink all season long, it’s time to get busy making a rink of your own. Be safe, and enjoy your very own icy paradise!

In case you missed out, check out Part 1: Understanding How Ice Forms and Part 2: Creating Your Winter Wonderland.

Always Promote Pond Safety

How to Make an Ice Rink on Your Pond – Part 2 | Ponds & Lakes Q&A

How to Make an Ice Rink on Your Pond - Part 2

How to Make an Ice Rink on Your Pond

Part 2: Creating Your Winter Wonderland

A thick, solid, strong and dense ice sheet on your pond or lake means you’ll have some cold-weather fun on your skates this winter. But how do you determine if that ice is safe to hold an ice skater, a hockey team or a truck to transport all their gear?

In this second part of our three-part series on how to make an ice rink on your pond, you’ll learn how to identify the perfect spot for your rink, how to measure your ice sheet’s thickness, how to create a glassy smooth skating surface, and how to build your winter wonderland.

Thick and Blue, Tried and True…

You’ve been watching your ice sheet develop over the fall and winter, and you think it’s ready to be fabricated into a fantastic ice rink. The first step is to identify an area on your pond or lake with the best ice. What does that look like? It should be:

  • Thick and strong. By “thick,” we mean inches of solid ice – up to 12 to 15 inches, depending on your plans for the rink. Some general guidelines are outlined below:
    • 3 inches or less: Not safe, so stay off the ice.
    • 4 inches: Suitable for ice fishing, cross-country skiing and walking (about 200 pounds).
    • 5 inches: Safe for a snowmobile or ATV (about 800 pounds).
    • 8 to 12 inches: OK for a car or group of people (about 1,500 to 2,000 pounds).
    • 12 to 15 inches: Suitable for a light pickup truck or a van.
  • Solid, blue to clear. This is high density, very strong and safe ice when thick enough. Areas that appear light gray to black, white to opaque, mottled or slushy are unsafe and should be avoided. Also stay away from areas with cracks or breaks, ice that appears to have thawed and refrozen, and abnormal surfaces you haven’t seen before, like ridges caused by currents or winds.
  • Located away from inlets and outlets. Moving water affects the integrity of the ice, so avoid areas near inlets/outlets and springs.

Before you go out on the ice, follow safety protocols: Tell someone where you’re going, dress accordingly, wear a floatation device, carry a change of clothing and an emergency kit in a waterproof bag. When inspecting the ice, remember this rhyme: “Thick and blue, tried and true; thin and crispy, way too risky.”

Checking the Ice

So how do you check your ice sheet’s thickness and quality? You have three options: an ice chisel, an ice auger and a cordless drill. You’ll use one of these tools – along with a tape measure, of course – to carve a hole in the ice and check on what’s happening below the surface.

An ice chisel is your most basic ice-checking tool. It’s a metal rod with a sharp, flat blade welded onto one end. You drive the chisel into the ice using a stabbing motion until you create a hole. *This option may not be the best if you have fish. Pounding on the ice can cause fish stress.

Augers drill a hole in the ice via a spiraling blade that’s rotated by hand or powered by an electric or gas motor. Hand augers are inexpensive, lightweight and quiet to operate. Electric augers are also quiet, but they require less manual labor to operate. Gas augers blast through the ice fastest, but they’re heavy, noisy and more costly than hand or electric models.

A 7.2-volt cordless drill with a long, five-eighths-inch wood auger bit will drive through 8 inches of ice in less than 30 seconds. It’s the most efficient way to get the job done.

Once you have made a hole in the ice, measure its thickness with a tape measure. Put the tape measure into the hole and hook the bottom edge of the ice before taking a reading. While you’re there, inspect the quality of the ice. It should be dense, blue and thick – at least 4 inches.

Create a Glassy Smooth Surface

Now that you have identified the perfect spot for your rink, it’s time to prep the surface. First, check the weather to make sure below-freezing temperatures are forecasted for the next five nights. Then, gather some gear, including a flat-head shovel, a pickaxe or hatchet, and a bucket or garden hose, head out to the rink site and get to work:

  1. Stake out your skating area. A 50-foot by 100-foot rink is plenty of space to start with, particularly on a smaller pond. The area can be expanded as needed.
  2. Shovel the entire surface Next, using your flat nose shovel, push the snow from side to side in the middle of the ice, and then from the middle out to the ends.
  3. Strategically pile up the snow. Create seating areas, hockey goals and some backstops at either end of the rink.
  4. Access some water. You’ll need water to pour onto the surface of your rink, so break through the ice with your hatchet or pick axe to create an opening large enough for a bucket or garden hose. Build a ring of snow around the hole for future reference.
  5. Ice the surface Fill your bucket with pond water and pour it onto the exposed ice sheet. If you’re using a hose, siphon the water and distribute it evenly on the surface. Repeat until you’ve evenly covered the area with water.
  6. Freeze and repeat.. Let the pond ice freeze overnight. Return to the pond the next day and repeat the process for five nights.

Before long, you’ll have a smooth, solid ice rink that’ll provide hours of fun for you and your friends.

Remember: Safety First

Despite all your careful and diligent rink-building efforts, it’s important to remember that there’s no absolute guarantee that the ice is safe. Accidents can happen. Be proactive by installing a life ring nearby, and providing a first aid kit, blanket and other emergency essentials just in case someone does fall through the ice.

If you missed it, check out Part 1 – Understanding How Ice Forms and Part 3 – Maintaining Your Ice Rink.

Create A Smooth Skating Surface

How to Make an Ice Rink on Your Pond – Part 1 | Ponds & Lakes Q&A

How to Make an Ice Rink on Your Pond - Part 1

How to Make an Ice Rink on Your Pond

Part 1: Understanding How Ice Forms

One of the joys of having a pond on your property is being able to create a winter-sports wonderland. Whether you’re an ice skater or a hockey player, curling competitor or broomball aficionado, it’s sure nice to simply walk out to your ice rink, slip on your skates and play.

But before you groom your pond for ice sports, it’s important to understand how to safely create a sturdy ice sheet and what red flags to look for while the ice is forming. In this first part of our three-part series on how to make a rink on your pond, we begin with the basics.

From a Liquid to a Solid

Ever wonder exactly how ice forms? Here’s a quick lesson for you.

When the air temperature cools in the late fall and early winter, the water on the surface of your lake or pond loses its heat and becomes heavier. This cold, heavy water sinks to the bottom while the warmer water from the bottom rises to the top and cools. The cycling process continues until the overall water temperature reaches 39º Fahrenheit (or about 4º Celsius).

Before long, the water on top cools enough to freeze. As it does so, the liquid molecules transform into solid ice crystals—and those things expand and space themselves out when they form, which is why ice floats and why it takes up more room than liquid. When given enough time to form, the ice layer created by this crystallized frozen water thickens to the point where it is strong enough to support animals, humans and even vehicles.

Creating Good Ice

Since your goal is to create an ice rink, you’ll need to grow a sheet of ice that’s thick, solid, strong and dense. Water movement affects the integrity of the forming ice – in fact, just a little bit of movement on the water surface can create uneven, porous ice that’s not suitable for walking or skating. So it’s important to turn off and remove your water-moving Aeration System from the lake before the ice starts to build on your lake’s surface.

The winterizing process starts with unplugging your aeration system and shutting it down completely. Leave the airline and diffuser plates in the pond, but cover the airline ends to prevent debris from entering. Finally, store the compressor and cabinet indoors to keep them dry and rust-free.

The only movement your lake water should experience now will be from wind and waves – both of which are in Mother Nature’s control.

Beware of Red Flags

As the ice is forming, keep an eye on it. Do you see any weak or soft spots? Are there any areas with running or pooling water? These could be signs telling you to abandon your ice rink plans. Here are some more red flags to watch for:

  • Flowing water near or at the edges of the ice can cause soft spots that appear gray, dark or porous.
  • Flowing springs under the ice in spring-fed ponds and lakes can cause areas to not freeze.
  • Water flows in and/or out of the iced-over water body. Stream inlets and outlets can erode ice, making it highly variable in thickness.
  • Areas with cracks, breaks or holes are obvious danger zones.
  • Ice that appears to have thawed and refrozen. These fluctuations can cause weak spots in the ice.
  • Abnormal surfaces that you have not seen before, like pressure ridges caused by currents or winds.

Ice is generally strongest where it is hard and blue or clear. If you’re unsure of whether your ice is forming well, check with your local government officials (like your department of natural resources) about safety suggestions.

Next week, we’ll discuss how to make sure your newly formed ice is thick and safe enough for winter sports, and how to create a pristine winter wonderland with ice primed for fun.

Continue Reading:
Part 2 – Creating Your Winter Wonderland
Part 3 – Maintaining Your Ice Rink

Always Promote Pond Safety

Will my fountain be enough to keep my fish safe this winter?| Ponds & Lakes Q&A

Q:Will my fountain be enough to keep my fish safe this winter?

Q: Will my fountain be enough to keep my fish safe this winter?

Holly – Gorham, ME

A: If your pond freezes over in the winter, a fountain won’t do you or your fish much good. It’s not designed to be run or left in the pond during icy conditions. The ice can damage the float or create a barrier that prevents water from passing through the spray nozzle. That could cause the motor to run dry and stop working. And that’s not good.

Instead, we recommend completely removing your fountain and a run a bottom diffused aeration system instead.

Before the Ice Forms

Autumn is the perfect time to remove the fountain from your pond before the ice forms. When unplugging the motor and pulling it ashore; inspect the cords, motor and lights for any damage. After sitting in a pond all summer, chances are you will have to clean the fountain and lenses from any algae, build up or debris. Once your fountain is ready to be stored, place it in doors until spring.

Below the Surface

Now that you have removed the fountain from the pond, it is a good idea to protect both your fish and boating dock from ice damage by adding an aeration system. Aeration keeps the oxygen levels up and the water circulating. Depending on how close the diffuser plates are to the surface or dock, aeration can also keep a hole open for gas exchange, and provide a place for ducks to gather when everything else is frozen over.

Keep your fish safe and happy this winter by giving them surface and subsurface aeration. They’ll appreciate it more than just your fountain!

Pond Talk: How much aeration do you have in your pond or lake during the winter?

Shade & Prevent Damage From Winter Ice - Airmax (r) Shallow Series (t) Aeration Systems

If I run my waterfall pump for a few hours a day during winter, will my fish be OK?| Decorative Ponds & Water Gardens Q & A

Q: If I run my waterfall pump for a few hours a day during winter, will my fish be OK?

Q: If I run my waterfall pump for a few hours a day during winter, will my fish be OK?

Lenny – Waggoner, IL

A: While it may be beautiful to run your waterfall during winter, it is not always recommended. A waterfall pump moves and circulates oxygenated water through the water column, but if you run it for just a few hours each day, your fish – and your pocketbook – may suffer. Here’s why.

  • Oxygen Starved: First of all, your fish need plenty of fresh oxygen, even when they’re semi-dormant in the wintertime. A few hours of circulation from a waterfall pump won’t keep a hole in the ice or infuse enough oxygen into the water, so the lack of fresh air will stress out your finned pals and put them at risk for disease.
  • Ice Dams: If you run your waterfall pump in northern climates during near- or sub-freezing temperatures, ice dams can develop and grow in size, diverting water from the pond. For this reason, you’d need to keep an eye on your water level – particularly if you have a longer stream. When the water level gets too low, your pump could become damaged, which means you’ll need to fork out some cash to replace it.
  • Overstressed Pump: Speaking of replacing a pump, take a look at your pump’s manual. Does it say that your pump is it designed for use in freezing temperatures? Generally speaking, pumps should be at least 2,000 GPH to operate in the winter.
  • Big Energy Bill: The cost of running a waterfall pump can easily top $100 a month. The cost of running a de-icer alone to keep a hole in the ice for gas exchange can cost up to $75 a month. Those aren’t cheap options! An aerator; however, is a cost-effective solution that’ll only cost you around $1.70 a month. In addition, you can use aerators throughout the year.

Because of the risk of damaging the waterfall pump and not providing enough oxygen to your fish – along with the high cost of running it all the time – we recommend removing the pump this winter and replacing it with an aerator.

Stowing the Pump

When you remove your pump, submerge it in a 5-gallon bucket of water to keep all its seals lubricated and store it indoors in a place that won’t freeze. Blow out the water and debris in your tubing with an air compressor and cap it off. Drain the skimmer boxes below the weir door. And spray your filter media off with a hose, pump out any water in the filter box and give it a good scrubbing.

Installing Aeration

Once your pump is removed and stored for the season, install an aeration system that’s sized right for your pond. KoiAir™ Aeration Kits, are designed for ponds up to four feet deep and 16,000 gallons, includes a compressor, airline and a diffuser plate. PondAir™ Aeration Kits are suited for ponds up to two feet deep and 2,000 gallons, includes a compressor, airline, check valves and air stones. Simply connect the diffuser plate or air stones to the compressor, submerge the plate/stones and plug it in, and you’re good to go!

You’ll be delivering oxygen to your fish, keeping a hole in the ice and preserving your waterfall pump – and saving a bunch of your hard-earned money.

Pond Talk: What tricks do you have to save money on pond expenses?

Save On Energy This Winter - Airmax (r) KoiAir(t) Aeration Kits

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