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How can I control the duckweed in my pond? | Ponds & Lakes Q&A

Q: How can I control the duckweed in my pond?

Q: How can I control the duckweed in my pond?

Kyle – Burke, KY

A: Duckweed is a tiny menace that definitely needs to be managed. Brought to your pond or lake by humans and their equipment or on the feet and feathers of visiting waterfowl, dense colonies of these plants can proliferate and eventually cover the water surface. It’s not something you want in growing your pond.

Duckweed or Watermeal?

Duckweed a very small, light green, free-floating plant with a single hair-like root and three 1/16- to 1/8-inch long leaves, or fronds. It tends to grow in dense colonies in quiet water that’s undisturbed by waves. You can fit six to eight of these plants of the tip of your finger.

Watermeal – another invasive plant that can be mistaken for duckweed – is also light green and free-floating, but it has no roots and is more of a grainy, seed-type plant. It’s also much smaller than duckweed; at less than 1 millimeter in size, you can fit 10 to 20 of them on the tip of your finger.

Duckweed and watermeal colonies can provide a habitat for microscopic critters and forage for hungry ducks, but the plants can reduce oxygen in the water if they grow to cover a lake’s or pond’s surface. That could compromise your fishes’ health and cut off sunlight to underwater plants.

Treat Effectively

To control duckweed, think short-term and long-term.

Short Term: Ultra PondWeed Defense® or Clipper™ used with Treatment Booster™ PLUS are your go-to herbicide products for short-term control of duckweed and other invasive aquatic weeds. They provide broad-spectrum pond weed control in slow-moving water and kill what’s actively growing in your pond. If duckweed hasn’t completely taken over your water surface, you may notice algae growth mixed in with the weeds – in which case you’ll need to treat the algae first. (Pro tip: Clipper™ will control both algae and duckweed.)

Long Term: For long-term control, you’ll need an herbicide like fluridone, which is found in Sonar™ A.S. When applied in early spring (or when you begin to notice weed growth), you’ll see the product controlling established plants in 30 to 60 days, and in 90 days, you’ll have full pond protection. Because exposure to sunlight can reduce Sonar’s effectiveness, use in combination with Pond Dye. If you use your pond water to irrigate, you will need to wait 30 days following treatment.

Improve Overall Pond Health

In addition to managing your menace with herbicides, you should also reduce muck and aerate the water to keep your overall pond healthy. The products in the ClearPAC® PLUS Pond Care Package – including PondClear™, MuckAway™ and EcoBoost™ – will help reduce the submerged and suspended organic debris. Combine that with some Airmax® Aeration, and your water will stay crystal clear all season long.

Pond Talk: What else do you do to control duckweed in your lake?

Treats Floating & Submerged Weeds - Valent® Clipper™ Aquatic Herbicide

The ice just melted and algae is already growing. Can I use an algaecide this early in the year? | Ponds & Lakes Q&A

Q: The ice just melted and algae is already growing. Can I use an algaecide this early in the year?

Q: The ice just melted and algae is already growing. Can I use an algaecide this early in the year?

Jeff – Avilla, IN

A: After a dreary, cold winter, growing greenery is a welcome sight – unless it’s algae in your pond. Bright sunshine, warmer temperatures, and an abundance of nutrients nurture the tiny organisms, and in no time they’ll turn your water into something resembling pea soup.

Algaecides are an effective solution, but they’ll only work if water temperatures are above 60 degrees Fahrenheit. So what can you do if it’s still chilly?

    1. Lightly Rake the Algae: Raking live algae isn’t typically recommended as it may encourage algae growth if it’s not all removed. However, if you’re contending with an enthusiastic algae bloom that’s taking over your lake, pull out your Pond & Beach Rake and lightly rake out the overgrowth.
    2. Add EcoBoost™, Pond Dye: After you’ve raked the live algae, follow up by adding EcoBoost™ and Pond Dye, which have no temperature restrictions. The beneficial bacteria booster in EcoBoost will enhance the growth of muck-destroying natural bacteria, while binding phosphates and adding trace minerals for your fish. The pond dye will limit the amount of sunshine that’s reaching into the pond.
    3. Increase Circulation: If you’ve removed your aeration system for the winter, now’s the time to get it out of storage, give it a tune-up, put it back in your pond and start it up. Here’s a quick primer on how to do it.

When water temperatures top 60 degrees F, you can destroy the algae with an algaecide like Algae Defense®. The fast-acting liquid combats floating filamentous algae, bottom-growing chara and planktonic algae that turn water green. Once the algae turns brown and dies, rake out the debris, and then add some natural bacteria, EcoBoost™ and pond dye – all of which are found in our all-in-one ClearPAC® PLUS Pond Care Package. It’s an easy way to manage your growing spring problem!

Pond Talk: What improvements are you planning on doing to your pond or lake this year?

Keep Your Pond Clean & Clear - Pond Logic® ClearPAC® PLUS

When I start my aeration system up do I need to turn it on for only a few hours a day like when it was installed? | Ponds & Lakes Q&A

Q: When I start my aeration system up do I need to turn it on for only a few hours a day like when it was installed?

Q: When I start my aeration system up do I need to turn it on for only a few hours a day like when it was installed?

Chris – Alpena, MI

A: Yes, gradually starting up your system for the season will avoid any quick turnover in your pond. Ideally, your aeration system should run all year long. By running it all year long, this will prevent possible winter fish kills. But if you shut your aeration system down in the winter for recreational purposes, you will want to start it back up when the ice starts melting off your pond. In addition to gradual start-up follow the steps below to prepare your system.

  1. Re-level Your Cabinet: Take your cabinet and system back outside and get it on level ground again.
  2. Change Your Air Filter: Your air filter, which prevents debris from entering your air compressor, can be cleaned periodically to remove light debris – but it should be replaced every three to six months for maximum system performance and longevity.
  3. Check and Clean Side Intake Air Filters: Take a look at your side intake air filters on your cabinet, and make sure they’re clean and unobstructed.
  4. Ensure Cabinet Fan Works: To make sure fresh air will tunnel evenly through your cabinet, flip on your fan and verify that it’s working properly.
  5. Purge Membrane Diffuser Sticks: Though they’re virtually maintenance-free, these diffuser sticks, which deliver the air bubbles to the water, should be purged and inspected before they are turned on for the season. More information on this process can be found in your Owner’s Manual.
  6. Airlines Cleared: The water may still be icy in your pond, so check your airlines for ice buildup. To clear them, pour 1 cup of isopropyl alcohol through the airline running out to each plate, turn on the compressor and push through the line to free any tiny icebergs.
  7. Start Your Compressor – Gradually: To prevent shocking your pond, follow your aeration system’s initial seven-day startup procedure. On Day 1, run the system for 30 minutes and then turn it off for the rest of the day. On each day following, double the time: Day 2, run for one hour; Day 3, run for two hours; Day 4, run for four hours; and so on. On Day 7, begin running it for 24 hours a day, seven days a week.
  8. Pressure Check: Once your system is up and running, make sure that its pressure gauge stays within the normal range of 5 to 10 psi. An easy way to do this to mark the gauge upon initial start up and check it regularly to verify pressure has not significantly risen above or dropped below your initial reading. Please note, this does not apply to Shallow Water Series™ Aeration Systems. It is also recommended to install a maintenance kit every 6-12 months, so if you find that your compressor is not producing as much airflow as it has in the past it may be time to perform some additional maintenance.

Following these simple steps will guarantee a smooth start to aerating your pond this spring. If you’re ever in doubt, check out your owner’s manual or contact us at 866-766-3435.

Pond Talk: Do you have a regular maintenance routine you follow for your aeration system?

Maximize Your Aeration System - Airmax® SilentAir™ Compressor Air Filter

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

Are there any concerns using our pond if I fertilize the lawn? | Ponds & Lakes Q&A

Q: Are there any concerns using our pond if I fertilize the lawn?

Q: Are there any concerns using our pond if I fertilize the lawn?

James – Augusta, GA

A: Lawn fertilizers can do beautiful things to your terrestrial landscape. They infuse the soil with nitrogen, phosphorous and potassium. They make the grass green and lush. They’re sometimes mixed with pesticides and selective herbicides, creating a bug and weed-free lawn. When used as directed, fertilizers give you an easy way to feed your meadows.

They do, however, have their down side – particularly if they find their way into your pond or lake.

The phosphorous found in lawn fertilizers can help feed algae growth in your pond. That algae growth, when left unchecked, can create pea-soup colored water, deplete its life-sustaining oxygen and harm your fish. That’s not all. Some lawn fertilizers contain other chemicals that may not be friendly to humans and your aquatic environment.

So how can you limit or prevent fertilizers from entering your pond?

  1. Divert storm water away from your pond: Some runoff will inevitably flow into your pond but, if possible, fashion trenches and canals that steer that storm water into the sewer system or an unused field.
  2. Find a fertilizer with low or no phosphorous: Fertilizer labels include three numbers that refer to their nitrogen (N), phosphorous (P) and potassium (K) levels. In a 5-3-4 fertilizer analysis, for instance, the “3” represents the amount of phosphorous; the higher the number, the more phosphorous in the mix. When shopping for a lawn fertilizer, choose one with the least amount of phosphorous.
  3. When fertilizing, stay at least 25 feet away from the pond’s edge: This will create a fertilizer-free barrier around your pond, thereby preventing the chemicals from leeching into the water.
  4. Use natural products that help cleanse organics from pond water: If algae blooms do happen in your pond, use natural products that contain nutrient-eating beneficial bacteria. The microorganisms found in products like Pond Logic® PondClear™ will break down the suspended debris and muck, while Pond Logic® EcoBoost™ Bacteria Enhancer binds and eliminates phosphates and other toxins.

If the chemicals found in lawn fertilizers concern you, consider using a more natural approach. You can keep your lawn lush and green with grass clippings, aged compost and organic fertilizers. Treat weeds with vinegar/water/soap mixture or corn gluten. Think “green” when feeding your lawn – your pond and its residents will thank you for it!

Pond Talk: How do you fertilize the grass surrounding your pond or lake?

Bind Phosphates & Other Toxins - Pond Logic® EcoBoost™

We had a snapping turtle around our pond last year. Will he snap at us if we try to go swimming? | Ponds & Lakes Q&A

Q: We had a snapping turtle around our pond last year. Will he snap at us if we try to go swimming?

Q: We had a snapping turtle around our pond last year. Will he snap at us if we try to go swimming?

Greg – Chester, VT

A: Snapping turtles (Chelydra serpentina) are large freshwater turtles that make their homes in ponds and streams with plenty of room and food. When encountered in the water, they typically slip quietly away from any disturbance – but because they can have fierce dispositions, it’s a good idea to get to know these shelled reptiles and their habits a little better.

C. serpentina has a look all its own. Resembling a prehistoric dinosaur, the snapping turtle has a large, muscular build with a ridged carapace (hard shell) that can grow up to 18 inches. They usually weigh between 10 to 35 pounds. Its most defining features, however, are its long, flexible neck and beak-like mouth that it uses to snap prey and defend itself from predators.

On the Menu
The omnivore’s preferred meals include just about anything it can capture and swallow, including aquatic plants, invertebrates, fish, frogs, reptiles, birds and small mammals. It’ll even eat carrion. In a farm or swimming pond, a snapping turtle might snap up some undesirable visitors, like snakes.

Night Life
A snapping turtle is mostly active at night, but it does venture out during the day to bask on fallen logs and scavenge and hunt for food. When C. serpentina is walking the terra firma, it can be aggressive, particularly when it feels threatened – and this is when you should avoid contact at all costs. A snap from a snapping turtle can be painful!

Remove and Relocate
If a snapping turtle is causing problems in your pond, your best bet is to safely and humanely remove it. Grabbing its shell with your hands is a bad idea; it can easily stretch its neck back across its own shell to its hind feet and snap your fingers, and it can scratch you with its sharp claws.

Instead, trap it in a turtle trap, like one of our Tomahawk Live Traps. The 32-by-18-by-9-inch trap made with 12-gauge wire comes pre-assembled and ready to use. Simply place it in the water partially submerged and bait with fish or meat. When you capture the critter, relocate it to a place that has a water body, food and shelter.

Pond Talk: What types of game fish do you have in your pond or lake?

Trap Unwanted Guests - Tomahawk Turtle Trap

I know bass are good predator fish to put in a pond, but does it matter if they are largemouth or smallmouth bass? | Ponds & Lakes Q&A

Q: I know bass are good predator fish to put in a pond, but does it matter if they are largemouth or smallmouth bass?

Q: I know bass are good predator fish to put in a pond, but does it matter if they are largemouth or smallmouth bass?

Joe – Alhambra, IL

A: Bass – both largemouth and smallmouth – make excellent predator fish. These strong, scrappy guys keep your bluegill population in check. They chase frogs, eat crustaceans and snails, and even catch unsuspecting birds and rodents like small muskrats. They’re a definite asset in your pond or lake.

These two fish cousins, however, have their differences. Read on to learn which is better suited to your pond or lake.

Distinct Differences

Though they’re both species of fish in the sunfish family, largemouth and smallmouth bass have different physical characteristics. The largemouth bass, Micropterus salmoides, sports a big grin that extends way back beyond its eye, while the smallmouth bass, Micropterus dolomieu, has a smaller smile that reaches only to the middle of its eye. They also differ in their color and color patterns; the olive green largemouth has dark blotches of scales that run horizontally down its flank, and the brassy brown smallmouth has dark scales that run vertically.

Happy Habitats

These freshwater fishes both thrive in lakes, ponds and rivers, but each species has its preference. Largemouth bass favor crystal clear lakes with 2 to 6 feet of water, and sandy shallows and abundant rooted aquatic plants for spawning. They flourish in warmer water – even enjoying 80 to 90 degree temperatures in the summertime.

Smallmouth bass, however, are primarily river dwellers that like to hang out around pea-size to 1-inch-diameter gravel for spawning. They’ll tolerate lakes and ponds, but they like the steady current and higher rate of dissolved oxygen it provides. They also like water temperatures a bit cooler; anything warmer than 90 degrees F is lethal to smallmouth bass.

Food for Thought

These fishes also have different tastes in food. Largemouth bass aren’t too picky. They’ll gobble through a variety of foodstuffs, from Game Fish Grower Food to smaller fish like shad, perch, bluegill and sunfish. Smallmouth bass, however, stick to the bottom of the lake or river and nosh on crustaceans, insects and smaller fish.

Potential Pondmates?

Because both these guys are fun and challenging to fish, it would be fantastic to have both species in your pond or lake, wouldn’t it?

Large- and smallmouth bass can live together, but it takes the help of an attentive game fish manager to make that happen. The general consensus from most experts is that the largemouths will typically replace smallmouths in smaller pond settings unless subadult or adult smallies are introduced annually. Even if you provide an ideal spawning environment for them, the largemouths will still edge them out.

Bottom line: You’re better off with the largemouths. They’re easier to keep, and they adapt more readily to a pond- or lake-type environment.

Pond Talk: What types of game fish do you have in your pond or lake?

Promote Rapid Fish Growth - The Pond Guy® Game Fish Grower Fish Food


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