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I thought I did a successful chemical treatment, but why are the weeds coming back? | Ponds & Lakes Q&A

Q: I thought I did a successful chemical treatment, but why are the weeds coming back?

Q: I thought I did a successful chemical treatment, but why are the weeds coming back?

Barney – Andalusia, AL

A: Treating weeds is a tricky task. Despite dosing them with aquatic herbicides to clear your pond or lake of plant pests, they seem to grow back over and over again. It seems like a never-ending cycle!

Why does this happen?

Well, chemical treatments have their benefits and drawbacks: On one hand, they work great as a quick fix to decimate actively growing weeds. But once those plants die, they become a food source for future weeds and algae, acting as a fertilizer for the very things you’re trying to get rid of. The herbicides do nothing to prevent future growth, and so you’re left with yet another growth spurt of pond weeds, which you’ll then treat with chemical herbicides – and around you’ll go again.

So how do you break the cycle? Here’s a four-step approach that will help put an end to it.

  1. Remove the Dead Weeds: Once the weeds have browned, use a Pond & Beach Rake or PondSkim™ Debris Skimmer to remove as much dead material from the water as possible. This prevents dead plant material and muck from accumulating and fertilizing future weed growth.
  2. Be Proactive: Debris will still find its way into your pond, so add some beneficial bacteria to the water to manage the excess nutrients before they feed your weeds. The products found in the ClearPAC® PLUS Pond Care Packages – including PondClear™ and EcoBoost™ for suspended debris, and MuckAway™ for accumulated bottom-of-the-pond debris – naturally break down that organic material.
  3. Add Aeration: If you don’t have one already, install a Airmax® Pond Series™ Aeration System that’s sized for your pond or lake. By circulating and adding oxygen to the water column, the beneficial bacteria will thrive. In turn, they’ll eat through even more debris and prevent weed and algae growth.
  4. Shade and Color: Also found in the ClearPAC® Plus package is Pond Dye, another offensive tactic in your battle against aquatic weeds. Pond dye shades the water blue or black, preventing ultraviolet light from reaching the plants.

Throughout the spring and summer, weeds will grow. But with some pond management practices, you can keep those pesky plants to a minimum.

Pond Talk: How often do you treat your pond or lake for weeds?

Remove Floating Debris Quickly - The Pond Guy(r) PondSkim(t) Debris Skimmer

I had a bad duckweed problem last year. How do I prevent it this year? | Ponds & Lakes Q&A

Q: I had a bad duckweed problem last year. How do I prevent it this year?

Q: I had a bad duckweed problem last year. How do I prevent it this year?

Alex – Alvada,OH

A: As you know, Duckweed is a persistent pond pest. Dense colonies of these prolific plants can completely cover the surface of a lake or fish pond, causing dissolved oxygen depletions and fish kills. These tiny invaders need to be managed before they take over.

ID Duckweed

Transported by waterfowl, Duckweed is a very small, light green, free-floating plant that sports a single hair-like root and three 1/16- to 1/8-inch long leaves, or fronds, that resemble a four-leaf clover. It tends to grow in dense colonies in quiet water that’s undisturbed by waves, and it’s often mistaken for algae.

Though Duckweed colonies can provide a habitat for microscopic critters and forage for hungry ducks, the plant can wipe out oxygen in the water if it grows to cover a lake’s or pond’s surface. That could compromise your fishes’ health and cut off sunlight to underwater plants.

Plant Pest Control

Because Duckweed is such a small plant that spreads very quickly, it can be difficult to control – and so it’s critical to treat your pond or lake early in the spring when the growth first appears.

To manage these aquatic bad guys, you’ll need an herbicide. We recommend Sonar A.S., a weed killer that provides season-long control against unwanted plants like Duckweed. It’s designed for water bodies that have no water outflow, as it can take 30 to 60 days to control established weed growth and up to 90 days for full protection of your pond.

Sonar A.S. degrades quickly in sunlight, and so you must add Pond Dye at the time of treatment. The dye will shade the water and allow the herbicide to work effectively.

Short-Term Solution

If you want to remove the Duckweed for a short period of time but your pond or lake has an outflow that prevents you from using Sonar A.S., you can remove the tiny plants with the Pond Skim. The floating tool, which is 5 feet wide, collects surface debris when dragged across the water.

Pond Talk: How do you remove duckweed from your farm pond or lake?

One Treatment for the Entire Season - Sonar™ Fluridone Aquatic Herbicide

I’ve heard a lot about Clipper Herbicide. What does it do? | Ponds & Lakes Q&A

Q: I’ve heard a lot about Clipper Herbicide. What does it do?

Eldon – Urbandale, IA

A: Clipper™ Aquatic Herbicide controls a wide variety of algae, floating weeds and submerged weeds, but its claim to fame is its ability to wipe out troublesome watermeal and duckweed—two aquatic weeds that can be difficult to manage in any pond or lake. In fact, when used as directed, up to 80 percent of duckweed and watermeal will be eliminated within the first application of Clipper™. Not too shabby!

Here are some tips for use:

  • Check your pH first: High pH levels will reduce Clipper’s™ effectiveness, so test the pH of your pond’s water with a pH Test Kit before using the herbicide. Apply it only when the pH is 8.5 and below.
  • Apply on a sunny morning: The herbicide is a reactive treatment that works better in the sunlight, so treat your pond or lake early in the morning on a sunny day. Hold off on adding light-blocking Pond Dye to your water, until after Clipper™ has had a chance to go to work on the weeds.
  • Spray and play: Applying Clipper™ to aquatic weeds is easy. Simply mix the amount of Clipper™ and water in a Specialty Pond Sprayer according to label instructions, and spray onto floating weeds and algae or place the tip beneath the water’s surface to treat submerged weeds. Over time, the weeds will begin to brown and die.
  • A little goes a long way: You only need to use 1 pound of Clipper™ per surface acre one to two times per year. Because it’s a contact herbicide, complete coverage is essential for effective control. You can reapply Clipper™ after 28 days if you find that you’ve missed some weed patches after the first treatment.
  • No temperature restrictions: Clipper™ can be used year-round in any temperature, but it should be applied only when the weeds are actively growing.
  • Rake away the debris: Once the aquatic weeds are completely dead, use a rake—like the Pond & Beach Rake – to remove the debris. This will prevent the foliage from accumulation and turning into algae-feeding muck.

Clipper™ Aquatic Herbicide can be used in a range of waterways, including bayous, canals, drainage ditches, lakes, marshes, freshwater ponds and reservoirs. It quickly and effectively controls watermeal, duckweed, water lettuce, giant salvinia, cabomba, Eurasian watermilfoil, hydrilla and curlyleaf pondweed. If you fight aquatic weeds in your lake or pond, consider using Clipper™. It’s good stuff!

Pond Talk: Have you tried Clipper™ in your pond or lake? If so, tell us how it worked for you.

Valent® Clipper™ Aquatic Herbicide - Control Tough Invasive Weeds & Algae

I think I have duckweed or watermeal. How do I know? And how do I treat it? | Ponds & Lakes Q&A

Q: I think I have duckweed or watermeal. How do I know? And how do I treat it?

Q: I think I have duckweed or watermeal. How do I know? And how do I treat it?

Richard – Fishers, IN

A: Duckweed and watermeal are both pond pests. Dense colonies of these prolific plants can completely cover the surface of a lake or fish pond, causing dissolved oxygen depletions and fish kills. These tiny invaders need to be managed before they take over.

But before you control them, you need to get to know them. Let’s meet these troublemakers.

Watermeal

The smallest seed-bearing plants in the world, watermeal is a very tiny (less than 1 millimeter) light green free-floating rootless plant that resembles green cornmeal. They prefer quiet water that’s undisturbed by waves, and they’re often associated with colonies of duckweed and mosquito fern (azzola). Unchecked, these plants can be aggressive invaders.

Duckweed

Duckweed is another very small light green free-floating plant, but unlike watermeal, duckweed has a single root and one to three leaves, or fronds, that measure 1/16- to 1/8-inch long. Like watermeal, duckweed tends to grow in dense colonies in quiet water that’s undisturbed by wave action. Duckweed colonies provide habitat for micro invertebrates, but if it completely covers the surface of a pond for an extended period, it will cause oxygen depletions. As its name implies, duckweed is often gobbled by ducks, which also transport it to other bodies of water but you cannot count them for keeping the weed in control.

Stop the Invasion!

To control these aquatic bad guys, you’ll need a herbicide. Clipper™ and Ultra PondWeed Defense® are both selective plant killers that will attack watermeal and duckweed. They’re a short-term solution for both—be sure to apply as directed.

For long-term control of duckweed, you’ll need something a bit stronger. We recommend Sonar™ A.S.. It’s formulated to control stubborn aquatic weeds all season long. Don’t forget to add pond dye, it protects the Sonar™ A.S. from being quickly degraded by the sun.

Pond Talk: Tell us about your experiences with duckweed and watermeal. Do you have any additional management tips to share?

Deliver Fast & Selective Control Of Weeds - Valent® Clipper™ Aquatic Herbicide

Is there an easier way to get rid of weeds? I’m tired of pulling them by hand. | Ponds & Lakes Q&A

Is there an easier way to get rid of weeds? I’m tired of pulling them by hand.

Q: Is there an easier way to get rid of weeds? I’m tired of pulling them by hand.

Beverly – Richfield, WI

A: Who doesn’t love tools? They’re cool to look at, fun to play with – and, the best part, they help make chores easy. When it comes to maintaining your pond or lake, tools of all shapes and sizes will come in very handy, particularly these four must-haves, below.

Pond Rake

A pond rake pulls, gathers and removes dead debris from the surface or the bottom of a pond.

Debris on the surface of a pond, like algae or fallen leaves, can sink to the bottom and start to decay, adding to the muck and detritus that’s already there. All that debris degrades water quality, compromises fish health, provides a nutrient source for nuisance plants, and can even affect chemical treatments’ ability to work.

A floating/sub-surface pond rake, like the The Pond Guy® Pond and Beach Rake, or a sub-surface pond rake, like the Jenlis Weed Raker™, lends a long helping hand. Elongated by rope so you can easily get the deep-water growth, both rakes work by removing submerged lake and pond weeds by their roots, slowing their spread.

Weed Cutter

A weed cutter, like the The Pond Guy® Weed Cutter and the Jenlis Weed Razer™, mechanically slices through weeds at their stems so they can then be raked out.

The 28-inch, double-sided The Pond Guy® Weed Cutter features a two-piece, rust-proof, powder-coated aluminum handle that’s 11 feet long. It’s great for removing floating aquatic vegetation, marginal weeds and cattails that extend past the pond’s edge.

The V-shaped Jenlis Weed Razer™ clears a 4-foot-wide path in pond weeds by sinking to the bottom and slicing through submerged weeds like watermilfoil, cattails and lily pads as you pull it across the pond. The razor-sharp tool weighs just 8 pounds, making it light enough to toss 30 feet or more yet heavy enough to sink straight to the bottom.

Sprayer

A sprayer makes pond chemical application easy. Most liquid chemicals are more effective when they’re sprayed over the target weed, and a tank sprayer, like an The Pond Guy® Specialty Pressurized Pond Chemical Tank Sprayer, is designed just for this purpose. The 2.75-gallon pond tool features a wide-mouth fill top that minimizes accidental spills and a high-pressure tank that allows you to spray hard-to-reach weeds.

Invest in a separate sprayer just for pond chemicals. If you use lawn and garden chemicals in the same sprayer that you use on your pond, doing so can be toxic to fish and other aquatic life as residue could be left behind. Keep your fish and pond plants healthy and happy: Use a different tool for the job.

Granular Spreader

The final must-have tool is a granular spreader, which helps you disperse granular herbicides evenly over your target area – and that means a more effective weed kill-off. The rust-proof Earthway® Granular Hand Spreader holds 10 pounds of material in a large hopper and features an application adjuster that lets you control how much product is released with its smooth-action hand crank.

Pond Talk: If you could only have one pond-care tool in your toolbox, what would it be? Why?

The Pond Guy® Pond & Beach Rake - Remove Weeds & Muck Build Up

How Do I Treat Duckweed? | Ponds & Lakes Q&A

How Do I Treat Duckweed?

How Do I Treat Duckweed?

Tim – Rock Hall, MD

Duckweed is a very small floating plant about the size of a pencil eraser. It has shoe-sole shaped leaves with a small, hair-like root hanging below. Since duckweed floats on the surface of the pond, it is commonly mistaken for and treated as if it is algae. Unfortunately, algaecides have no effect on duckweed but there are a couple treatments you can do to keep the prolific duckweed at bay.

The Short-Term Solution
To treat duckweed as well as other aquatic weeds on a short-term basis, you can use Ultra PondWeed Defense® . This product is great for a one-time treatment or for spot treating. These are, however, only short-term solutions for duckweed. Due to their aggressive nature, duckweed can grow back in as little as 3 to 4 weeks. This is why we suggest a longer-term solution.

The Long-Term Solution
One of the only products on the market to provide long-term, season-long control of duckweed and other aquatic weeds is called Sonar™ A.S. Instead of having to spray the plant directly, Sonar™ A.S. is sprayed directly into the water. Sonar™ A.S. works by preventing photosynthesis in aquatic plants and by doing so causes them to slowly parish. Treating duckweed and other aquatic plants in this fashion allows for complete control of the entire water body for the season instead of just a few weeks.

The leaves are just starting to fall..I see netting for water gardens to keep the leaves out, do they make anything like this for large ponds? | Pond & Lake Q&A

The leaves are just starting to fall..I see netting for water gardens to keep the leaves out, do they make anything like this for large ponds?

The leaves are just starting to fall..I see netting for water gardens to keep the leaves out, do they make anything like this for large ponds?

Bryan – Traverse City, MI

When fall comes around, leaves and ponds seem to have a magnetic attraction to one another. And while netting is available in essentially any size you might need, it’s a cumbersome solution for larger ponds. Simply spreading the netting over a large pond is a major undertaking – and the impracticality of installing posts throughout your pond to keep leaf-covered netting from sinking makes other solutions look much more attractive.

At The Pond Guy, we strongly recommend aeration and chemical treatments to address inevitable leaf buildup for customers with large ponds. When you browse our web site, you’ll notice a wide range of Airmax® Aeration products. These aeration systems enable the pond to break down leaves quickly and naturally by keeping pond water moving – and the entire pond well oxygenated. When coupled with the beneficial bacteria in PondClear™, EcoBoost™ and MuckAway™, fallen leaves break down in no time to keep water clear, and both fish and plants healthy.

As an added measure in the fight against falling leaves and debris, you should also consider the use of a pond rake. With the regular use of our Pond & Beach Rake, you can easily remove excessive leaves and debris in no time flat.

Pond Talk: How do you keep fall leaves from accumulating in your pond?

Airmax® Aeration

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