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I’ve been told I should encourage weed growth for a good fish population. Won’t that cause an unhealthy pond for the fish? | Ponds & Lakes Q&A

Q: I’ve been told I should encourage weed growth for a good fish population. Won’t that cause an unhealthy pond for the fish?

Q: I’ve been told I should encourage weed growth for a good fish population. Won’t that cause an unhealthy pond for the fish?

Dave – Gary, IN

A: Fish love weeds. The growing greenery and roots create a healthy ecosystem, help to naturally filter the water, and provide home-grown food for your pond inhabitants. When weed growth isn’t happening, the water tends to get murky and cloudy, and weak invasive plants tend to take root – neither of which benefits your fish. Aquatic weeds, when they’re well managed, are a good thing for your finned pals.

If a thriving fish population is what you’re after, we have some tips and tricks to share. In addition to encouraging some controlled natural weed growth, here are some ways to grow your fish numbers via an artificial fish habitat.

  • Bump Up the Bait Fish: Bait fish, including fathead minnows, golden shiners and threadfin shad, feed your game fish – so you should create a healthy ecosystem for them as well. Natural weeds work, but so do artificial fish habitats like our Pond King Honey Hole Shrub, Tree and Fish Attractor Logs. Thanks to an easy-to-assemble dense-cover dome made from long-lasting polyethylene tubing, these habitats provide ample space for algae and egg attachment, and promote the survival of young fish.
  • Plan Fishing Spots: One of the best features of using an artificial fish habitat is that you can position it wherever you want in your pond or lake and fish through it without snagging – so why not plan some ideal fishing spots while encouraging a healthy bait fish and game fish population? Experts recommend placing three of the same type of fish habitats in triangular clusters about 18 inches apart, near spots that have a sharp contrast in water depth or near a floating dock or pier.
  • Go Deep and Shallow: Because bait fish prefer spawning in shallow habitats and game fish prefer hanging out in deeper areas, use the Honey Hole Shrub or Honey Hole Log in the shallows and the Honey Hole Tree in water more than 6 feet deep. The 32-inches-tall-by-6-feet-wide shrub imitates a natural weed bed, while the 6-feet-tall-by-7-feet-wide tree mimics natural fish cover and attracts game fish like bass and crappie. In areas deeper than 15 feet, you can easily suspend the tree off the lake bottom by attaching a length of rope tied to a weight.
  • Aerate and Circulate: Of course, providing adequate aeration with an Airmax® Aeration System will ensure a healthy ecosystem for your fishes, too. The oxygenated water circulates throughout the water column, delivering that life-sustaining O2 to all of your lake’s inhabitants.

Both game and bait fish need a comfortable environment to thrive, and Fish Habitats make it easy for you to create an ideal ecosystem for them.

Pond Talk: How do you create a healthy sub-surface ecosystem for your game and bait fishes?

Create Habitat for Your Fish - Pond King Honey Hole Fish Attractor Log

We just purchased a house and it has a backyard swimming pond. How do we measure it? | Ponds & Lakes Q&A

Q: We just purchased a house and it has a backyard swimming pond. How do we measure it?

Q: We just purchased a house and it has a backyard swimming pond. How do we measure it?

Rob – Hawthorne, FL

A: Surface area and pond depth are important measurements to know. They’ll help you determine dosage rates with chemicals like algaecide. They’ll help you calculate the right-size aeration system for your pond. And they’ll help you figure out how many and what types of fish to stock.

Finding those magic numbers isn’t difficult – but it does require some tools, the right equation and a little bit of work. Before you head out to your pond, grab a rope marked at 1-foot increments, a weight that’s heavy enough to sink to the bottom, and something for notetaking.

Calculating Surface Area

The easiest ponds to measure are those that resemble a rectangle, but you can figure out the surface area of a circular, triangular or odd-shaped pond, too. First, you’ll need to measure (with your marked rope) or pace off (one step is about 3 feet) some specific distances, depending on the shape of your pond. Then, plug those numbers into one of these formulas:

  • Square/rectangle: Calculate length and width; L x W = Surface Area
  • Circle: Calculate radius; Pi x R2 , or 3.14 x R x R = Surface Area
  • Triangle: Calculate base and height; (0.5 x B) x H = Surface Area
  • Odd-shaped: Use a handy online tool like Bing Maps to measure the pond. Online tools may be easiest, especially for irregularly shaped ponds.

To determine how many acres your pond is, you’ll then divide that surface area figure by 43,560 (one acre).

Calculating Depth

Figuring out your pond’s depth is a bit trickier, particularly if you have plant shelves or if the pond has a slope. Grab your marked string, the weight, something to write with, and a boat or canoe. Then, head out to the pond and follow these directions:

  1. Securely attach the weight to one end of your string.
  2. Climb aboard your boat or canoe with your weighted string and note-taking materials in hand.
  3. Travel to at least five points in various areas your pond, more if your pond is particularly large.
  4. Drop the weight into the water and note where you feel it hit the bottom. Repeat until you’ve gone to all the different spots and gathered a good sampling of your pond’s depth.

Why They’re Important

Now that you know your pond’s size, why are those calculations important?

You’ll need the numbers to determine dosage rates on chemical products like those found in Pond Logic® ClearPAC® PLUS. If the pond has been around more than three to five years, chances are good that you’ll need to address problems like muck accumulation and string algae growth in the spring.

Those numbers will also help you select the right-size Aquastream™ Fountain and Airmax® Aeration System. For instance, if your pond is less than 6 feet deep, our Shallow Water Series™ Aeration System is a good choice; if your pond is greater than 6 feet deep, our Pond Series™ Aeration System is the one for you.

Since you’ll be able to calculate how many acres your pond is, you’ll also be able to determine what types of fish you can have and how many of them you can keep. Finally, because you’ll know the various depths of your pond, you’ll be able to stake out safe swimming areas for children – but don’t forget to put out your life ring!

Pond Talk: What swimming pond maintenance tips can you offer to this new homeowner?

Reduce Pond Muck - Airmax® Pond Series™ Aeration

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

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

My water quality is good now, but what do I need to do over the winter to keep it that way? | Ponds & Lakes Q&A

Q: My water quality is good now, but what do I need to do over the winter to keep it that way?

Q: My water quality is good now, but what do I need to do over the winter to keep it that way?

Quintin – Pine Bluff, AR

A: When it comes to doing chores at the pond, it is easy to let your guard down this fall. Thanks to your hard-working bacteria, the water is clean and clear with minimal algae, and your fish are happy. You have nothing to do but coast into winter and hibernate until spring.

Not so fast.

As water temperatures drop, those bacteria and algaecides stop fighting off excess nutrients and cold-temperature plant growth. They are no longer effective at their jobs, and so you need to step in and help. Here’s what you can do to maintain pristine water quality over the winter.

  • Add Some EcoBoost™: Formulated to bind organic debris suspended in the water, Pond Logic® EcoBoost™ helps to clear water and enhance beneficial bacteria. It also provides more than 80 trace minerals to fish, keeping them healthy over the winter. EcoBoost™ has no temperature restrictions, so you can use it all year round. Simply mix the powder with some water in a pail and pour it in the pond.
  • Tint with Pond Dye: During the cold temperatures and even iced-over conditions, algae and plants can grow along the bottom since they are still exposed to sunlight. Pond Dye can be used year-round – winter included – to control algae growth by shading the plants from the sun’s UV rays. The dye also imparts a dramatic hue to the water, giving it a great look when it ices over.
  • Aerate and Oxygenate: You can also improve water quality through the winter by keeping the oxygen levels up and water circulating. If you are not going to use the pond for ice-skating or hockey, we recommend you use a subsurface aerator, like the Airmax® Aeration Systems. The system will keep the air bubbles flowing throughout the water column while maintaining a hole in the ice for gas exchange. If you have a fountain running, remove it and store it for the winter. Ice can damage the motor in the pump.

Before you hibernate for the winter, spend a few hours out at the pond to prepare it for winter. When you look out on a crystal clear pond in January, you’ll be happy you did!

Pond Talk: How do you keep your pond clean and clear during the winter months?

Sink Suspended Organic Debris - Pond Logic(r) EcoBoost(t) Bacteria Enhancer

What is supercooling? | Ponds & Lakes Q&A

Q: What is supercooling??

Q: What is supercooling?

Aloma, Warroad, MN

A: Supercooling is uncommon, but it can occur in lakes and ponds, particularly in the northern states. Here’s what you need to know about it and how to prevent it from happening.

In the winter time water stratifies in pond and lakes without proper aeration when surface temperatures are extremely cold, creating what’s called a thermocline. A thermocline happens as warmer water about 39°F or so – sinks to the bottom, while colder water about 32°F or so – rises to the top. Very little mixing of the layers occurs, particularly in calm weather.

Supercooling could become an issue if you’re running a surface aeration system in shallow ponds with fish. The fish prefer to stay on the bottom of the pond in the warmer pockets of water during the winter. They’re in winter-hibernation mode, and all they want to do is be in a stress-free spot until spring.

As the aerator circulates the warmer water with the cooler water at the surface, the overall temperature could drop. In extreme cases when the temperatures are well below 0°F, the water temperature can actually drop below its freezing point without becoming a solid – a rare process known as supercooling.

If the water gets too cold, your fish have nowhere warm to go. Living without their warm hangout spot could compromise their oxygen supply and immune systems, making them vulnerable to parasites and diseases.

The best way to deliver oxygen to your fish is with a bottom diffused aerator, like an Airmax® Aeration System. You can keep it running without creating an inhospitable environment for your finned friends by simply moving your diffuser plates closer to the surface or turning half of them off.

If you relocate the diffuser plates to a spot that’s about half the depth of your pond or run only 50 percent of them, a pocket of warm water will remain for your fish at the bottom. You’ll continue pumping oxygen into the water and keeping a hole in the ice for gas exchange without having to worry about freezing your fish.

Pond Talk: What steps do you take to prevent over cooling or supercooling your pond?

Call (866) POND-HELP - Free Aerial Aeration Mapping Service

For winter, do I need to move my diffusers, or can I just close the valves?| Ponds & Lakes Q&A

Q: For winter, do I need to move my diffusers, or can I just close the valves?

Q: For winter, do I need to move my diffusers, or can I just close the valves?

Chuck- Tipton, IN

A: Diffusers – and the oxygen they pump into your pond or lake – ensure the health and well being of your fish. Year-round aeration circulates the water column and fills the pond with oxygen. If your pond freezes over during the cold months of the year, an aeration system will can also help maintain a hole in the ice to allow harmful gases to escape.

Move Your Diffusers:

As part of your winter-prep chores, you will need to move the diffuser plates to a shallower spot in your pond or lake. Why? Give your fish a place to safely overwinter in deeper, warmer water. When the plates are closer to the surface, they will also help to keep a hole open in the ice.

Close the Valves:

In addition to relocating your diffuser plates, you can also close about 50 percent of the valves (unless you have the PS10 or LS10 models of Airmax® Aeration Systems, in which case you leave the valve open). You won’t be mixing as much water, but you will be adding enough oxygen to the pond and allowing for gas exchange at the surface.

Stay Safe:

Because you’re aerating your pond over the winter, consider putting up a “Thin Ice” sign near the shoreline. Air pockets form in ice sheets created on aerated ponds, and they make the surface unsound and not safe to walk or skate on. Warn would-be hockey players and figure skaters of the danger before they get into trouble.

While you’re thinking about safety, make sure you have a Life Ring, first aid kit and blanket stowed lakeside in a weatherproof bin just in case someone does fall through the ice.

Pond Talk: How spectacular are the fall colors around your pond or lake right now?

Aerate Your Pond in All Seasons - Airmax (r) Pond Series (t) Aeration Systems


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