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Why Does Algae Keep Growing In My Pond, Even After I Treat With Algaecides? | Ponds & Lakes Q&A

Q: Why does algae keep growing in my pond, even after I treat with algaecides?

Cathy – Bagley, WI

A: Algae seems to take on a life of its own sometimes, doesn’t it? Once that green slimy, stringy or seaweed-looking stuff crops up, it keeps growing and growing until you wind up with a messy situation in your pond or lake. Even if you treat it with algaecides, it still grows back.

Turns out that all these tiny plants need to grow is sunlight and food source – both of which are abundant during certain sunny times of year and when there’s a healthy mix of detritus built up along the bottom of the lake. To make things worse (or better for the algae!), when a pond is treated with chemicals, the process just adds dead algae to the pond, which is actually a food source for the growing algae.

Rather than battle this green monster after it has a foothold, it’s best to take a proactive approach. After you verify that you’re dealing with algae and not weeds (read here for a quick lesson on chara and other types of algae), we recommend you follow these four all-natural steps for preventing algae attacks:

1. Use Aeration: Aeration systems, like Airmax Aeration®, circulates debris that has accumulated in the lake or pond so it doesn’t settle at the bottom and become algae food. Aeration also spreads the debris throughout the water column, making it more accessible to beneficial bacteria that break it down.

2. Use Natural Bacteria: Natural beneficial bacteria, such as Pond Logic® PondClear™ Beneficial Bacteria, power through nitrates, breaking down fish waste, leaves and other organics that accumulate in the pond. This naturally improves the water clarity as the bacteria devour the sediment.

3. Use EcoBoost™: Pond Logic® EcoBoost™ Bacteria Enhancer is an innovative product that binds algae-feeding phosphates in ponds and stimulates the growth of essential beneficial bacteria, which are essential when controlling algae in your lake or pond.

4. Use Pond Dye: Because algae thrive in sunlight, Pond Dye filters those rays and stops them from reaching below the surface, thereby preventing algae from growing. Plus, the cool colors mask the soupy green hue of the algae.

We can’t guarantee your algae problem will disappear, but if you follow these steps you’ll be creating a pond that’s inhospitable to algae invaders.

Pond Talk: How have your algae blooms been this spring and summer compared to last year?

Airmax Aeration Systems - Even Ponds Need To Breathe

How Do I Tell Chara & Naiad Apart? | Ponds & Lakes Q&A

How Do I Tell Chara & Naiad Apart?

Thomas – Williamston, MI

It’s very important to be able to tell Chara and Naiad apart. Why? Because Chara is actually a form of algae and you must use an algaecide, like Algae Defense or Cutrine®-Plus, to treat it. Naiad, which looks similar to Chara, is an aquatic weed and you should use an herbicide, like Pond Logic® PondWeed Defense®, to treat it.
A couple of things to look for to help you differentiate between the two pond nuisances:

• Chara lacks true leaves because it is algae. Instead, it has 6 to 16 leaf-like branchlets that grow in spirals (whorls) around the stem. These branchlets often have tiny, thorn-like projections.
• Naiad has dark-green to greenish-purple, ribbon-like leaves. Naiad leaves are arranged oppositely on the stem, or sometimes in whorls of 3.
• Chara has no defined root system
• Naiad has a well-established root system
• Chara gets a foul, musky, almost garlic-like odor late in the season

If you are still unsure what type of plant you are dealing with, consider applying Hydrothol 191. A granular algaecide/herbicide, Hydrotol 191 is proven to treat both algae AND aquatic weeds but carries a 25 day irrigation & 3 day fish consumption restriction.

Pond Talk: Have you battled Chara or Naiad in your pond? How did you treat it?

Why Does My Pond Water Turn Green? | Decorative Ponds & Water Gardens Q & A

Why Does My Pond Water Turn Green? Why Does My Pond Water Turn Green? 

Joanne – Evans City, PA

Green water is a form of algae called planktonic algae and there are quite a few factors causing your water to be clear during the winter and green as the weather warms up. The main reason is the interruption of the nitrogen cycle.

In order for algae to grow, it needs a food source (nutrients) and sunlight. During the colder winter months of the year, nutrients within the water are less likely to increase due to the fact that the digestive systems of fish have slowed to a point where little, if any, nutrients (fish waste) are being added. Also, during the colder months, algae and aquatic plants are not as active at consuming nutrients.

As the weather warms up, fish become active, digestive systems kick back in and nutrients begin pouring in and if not held in check using aquatic plants, natural bacteria and filtration, green water will develop.

If you have chronic green water and still can’t keep it in check, consider a UV or Ion clarifier.

Aquascape IonGen Electronic Clarifier

When Should I Start Treating Floating Algae In My Pond? | Ponds & Lakes Q&A

When Should I Start Treating Floating Algae In My Pond?

When Should I Start Treating Floating Algae In My Pond?

Jacquelyn - Pottsville, PA

 

Spring is just around the corner and in some areas, algae is already growing. But the question we hear quite often around this time is, “When can I start?” or, “Is it too early to treat?” The answer really depends on what the weather is like at your pond.

Getting a jump start on algae early in the season can help control growth as the season progresses. Fortunately, treating floating algae and preventing its build up is rather easy and really only one factor may stop you…temperature.

Is your pond above or below 50 degrees? This is important because aquatic algicides become less effective when temperatures fall below 50° Fahrenheit. However, understand that treatments will still work, just not as well. If you have an abundance of algae growing when the water temperatures are below 50° Fahrenheit, it’s worth a quick treatment to get it under control early. If the water temperature is too low, wait to use any treatment and instead use a lake rake to remove excessive algae if you are not able to chemically treat it. Another up-and-coming product that works very well to skim floating debris is the PondSkim™ Pond Deskuzzer. The PondSkim™ is a tool that contains a float and debris catcher. Simply drag across the surface of the water to collect debris.

If you have algae already growing in your pond we suggest that you get a jump start on it and you’ll be happy you did.

Airmax Pond & Beach Rake

Is there an ideal temperature to treat algae? | Pond & Lake Q&A

Is there an ideal temperature to treat algae?

Is there an ideal temperature to treat algae?

Crystal – New Baltimore, MI

It depends what you mean by the word “treat.” If you’re looking to throw a party in its honor, pretty much any temperature will do – because algae grows all year ‘round, even during the winter months. But if you’re hoping to give it the kind of treatment that makes it feel extremely unwelcome, you’ll see the best results when water temperatures are at 50 degrees Fahrenheit or higher. When water is warmer, algae tends to thrive. Because it’s thriving, it’s feeding – making it much more susceptible to algaecides.

Because very few of our customers express interest in enhancing algae growth, we’ll assume most readers are in the latter category. And if you are, we have a variety of highly effective options to accomplish your objectives. Pond Logic Algae Defense Algaecide with Cide-Kick™ is among our safest, most effective weapons in the battle against algae. Algae Defense is a fast-acting aquatic algaecide, and it’s highly effective at eliminating a broad spectrum of pond algae. By including Cide-Kick, which breaks down algae’s natural defenses, this combination packs a particularly effective double-whammy, and makes short work of offending algae blooms.

For spot-treatment of algae growth, we also recommend Applied Biochemists Cutrine®-Plus Granular Algaecide. Formulated to make quick work of both surface and bottom-forming algae, this safe, powerful algaecide does double-duty by both killing existing algae, and inhibiting its future growth.

While some pond owners prefer to eschew algaecide and rake algae out manually, the raking-only approach requires much more maintenance and attention. Algae are extremely hearty, and raking leaves trace amounts in the pond, allowing for recurrent blooms. For longer-lasting impact, the ideal treatment includes the use of algaecides, followed by cutting with our Aquatic Weed Cutter, raking with our Aquatic Weed Rake, and follow-up treatment with natural bacteria to break down any remaining muck.

Give your algae the treatment they deserve before temperatures start to fall – and start next season with a leg up on their plans for next year’s invasion.

Pond Talk: What method of treatment have you used to maintain algae?

Algae Defense

I have a pondless water with some algae on the rocks, do I need a filter to clean it or is there something else I can use? | Decorative Ponds & Water Gardens Q&A

I have a pondless water with some algae on the rocks..do I need a filter to clean it or is there something else I can use?

I have a pondless water with some algae on the rocks, do I need a filter to clean it or is there something else I can use?

Matt – Howell, MI

For pond enthusiasts who are short on free time, we’re big fans of pondless waterfalls. Since they typically don’t have fish and don’t involve open bodies of water, there’s very little to maintain. Without fish waste, debris or muck to contend with, these beautiful features can add a lot to your yard – and require very little in return.

Occasionally, though, algae can form on rocks in in a waterfall. And unless you have a fondness for the green stuff, you’ll want to dispatch with it as quickly and efficiently as possible.

For some, biological filtration is a viable option. Since most pondless waterfalls rely on a basin for circulation, the installation of an appropriately-sized filter – and some filter media – will generally resolve any algae issues. But under the circumstances, filtration is rarely the simplest solution. At the Pond Guy, we strongly recommend the use of PondLogic® Oxy-Lift™ Defense® Pond Debris Remover. Oxy Lift™ is designed to break debris off rocks quickly and easily – without a lot of effort.

In fact, process couldn’t be much easier. Simply turn off the waterfall, sprinkle on Oxy Lift (be sure to avoid direct contact with any plants), and let it sit for ten minutes. If the algae are particularly well-established, light brushing can help to loosen things up. Once those steps are complete, simply turn the waterfall back on – and get the instant gratification of immediate results.

As an added measure to prevent recurrence of algae, a partial water change and an occasional basin cleaning goes a long way. So enjoy the limited free time you have. Your waterfall is waiting.

Pond Talk: How do you limit algae and debris build up on your waterfall?

Pond Logic Oxy Lift Defense Pond Debris Remover

My pond water is green. Do UVs really work? | Decorative Ponds & Water Gardens Q&A

My pond water is green, do UV’s really work?

My pond water is green, do UV’s really work?
Summer – Baton Rouge, LA

The short answer? Yes. While it might seem like smoke and mirrors, UVs help to consolidate algae particles, which are then removed through regular filtration. And because planktonic algae particles are typically responsible for green pond water, products like our all-in-one ClearSolution Filter and AllClear systems – which include UVs within their filters – and our Power UV™ Clarifiers – which can be added inline with your existing plumbing – are terrific resources to help keep pond water clear and clean. Bear in mind, though, that UV can’t work miracles, and has no impact on string algae.

Now that we’ve established the fact that UVs really do work, there’s an even bigger issue to consider. The presence of planktonic algae is, after all, a symptom of a larger issue – and UVs are simply a means to treat it. In order to reduce reliance on UVs and filtration, it’s important to consider the cause of the bloom.

Planktonic algae bloom in nutrient-rich water. Nutrients can come in a variety of forms. There are many culprits – including excessive fish food, an overabundance of fish (and the waste they produce), bird droppings, and even runoff from fertilized lawns. When too many of those nutrients are in your pond, algae – which are present in all water – multiply quickly to take advantage of what they see as a free lunch. When algae multiplies, a cycle begins which depletes oxygen, and can harm or kill both fish and beneficial aquatic plants. So take stock of your pond. Evaluate the number of fish you have – and adjust your feeding levels accordingly. If your pond is overpopulated, consider reducing the number of fish, and the corresponding waste they produce.

Finally, consider using our PondLogic® DefensePac®, which helps to improve water quality, eliminate muck and built-up debris, and to enhance fish health. With quick and easy application, you’ll see noticeable results in no time – and with minimal effort.

Pond Talk: Have you encountered green water in your pond? How did you remedy the situation?

The Pond Guy Clear Solution 4-in-1 Pond Filtration System

My pond looks like an oil slick. Why and how can I get rid of it? | Pond & Lakes Q&A

My pond looks like an oil slick. Why and how can I get rid of it?

My pond looks like an oil slick. Why and how can I get rid of it?
Brandy- Naples, FL

Every year, Mother Nature unleashes a mass of pollen into the air to facilitate the fertilization of seeds in flowering plants. It’s an effective design, but not terribly efficient. Pollen ends up everywhere – just ask anyone who suffers from hay fever – and the surface of your pond is no exception.

Once settled on the surface, the pollen often mixes with algae to form a film that can give your pond that greasy, greenish look. If you’re unsure that the slick is due to pollen, run your finger through it. If the slick breaks up, you know your pond’s wearing an unsightly coat of pollen. And ‘unsightly’ defeats one of the purposes of having a pond to begin with, right?

So, what’s a frustrated pondkeeper to do? If you’re patient, you could wait for a heavy rain to come along and sink the pollen to the bottom. Or, depending on the size of your pond, a touch of artificial rain – think garden hose, here – might provide a temporary fix. However, to both fix the problem and prevent its recurrence, many of our customers have found that the installation of an Airmax Aeration System is a great solution. Our Airmax systems – available in models to fit your pond’s dimensions and needs – keep pond water circulating, which prevents the pollen from coalescing into an unsightly slick. Aesthetics aside, an Airmax System is a great way to keep your pond – and the plants and fish living there – clean and healthy.

For a more elegant solution to the pollen slick problem, you may want to consider a Kasco Fountain, which sprays water up and over the pond’s surface, causing ripples that prevent the formation of pollen slicks completely. Kasco Fountains are offered with single or multiple pattern sprays, adding a dramatic element to your pond-scape.

So, if you find your pond wearing an ugly, pollen coat, let us help you take it off, and replace it with that fresh, shimmering surface it deserves.

Pond Talk: Do you ever notice a white or greenish slick look on your pond?

Pond & Lake Fountains

Should I eradicate all algae from my pond? | Decorative Ponds & Water Gardens Q&A

Should I eradicate all algae from my pond?

Should I eradicate all algae from my pond?
Suzanne – Arlington, VA

In a word, the simple answer to this question is no. Algae serves a vital role in the health of your pond, providing both natural filtration and food for fish and wildlife. Algae also looks aesthetically pleasing in a pond, provided there’s not too much of it.

To better understand algae’s place in your pond, it’s important to know the different types that are common. First, there’s filamentous algae. Often referred to as “pond scum,” growth of filamentous algae typically begins on the pond bottom. As it grows, it rises to the surface, and can quickly spread to cover the entire pond if not controlled.

String algae is the second variety of algae pond owners will invariably come to know. Essentially a variation on filamentous algae, this algae isn’t harmful, but its rapid growth can quickly take over the pond if it’s not controlled. Frequently seen on rocks in waterfalls, string algae has been known to double its mass in 24 hours when conditions are right – leaving little room for beneficial algae growth, and inhibiting the growth of beneficial bacteria and plants.

Where filamentous alga are generally unwelcome in most ponds, planktonic algae is its beneficial counterpart. Planktonic algae generally thrives within the first few feet from the surface, where it relies on light for photosynthesis – and produces food for microscopic pond dwellers and newly-hatched fry. While typically desirable in ponds, planktonic algae can bloom, and some forms can be toxic to animals. In those circumstances, special measures may be necessary to control its growth.

In order to maintain a healthy balance of algae growth in your pond, there are a few simple steps that go a long way. First, consider our PondLogic® KoiAir™ and PondAir™a Water Garden Aeration Systems to ensure sufficient aeration. Stagnant water is an open invitation for excessive algae growth. Even if you have a waterfall, consider adding one to increase water circulation. For more aggressive algae treatment, our an algaecide such as AlgaeFix to kill the algae and then follow up with the Pond Logic® DefensePAC. And as a precautionary measure, consider adding a selection of Aquatic Plants to help maintain your pond’s equilibrium, to reduce excessive algae-promoting sunlight, and to provide safe havens for fish.

Pond Talk: What type of algae do you battle most?

Pond Logic® DefensePAC®

How can I reduce algae growth in my pond? | Pond & Lakes Q&A

How can I reduce algae growth in my pond?

How can I reduce algae growth in my pond?
Ryan – Dallas, TX

As we progress through spring and into summer, it is important that you know how to treat algae growth should you experience an algae bloom. Persistent algae blooms will still flex their muscles even if you maintain a clean pond. There are really two approaches, a reactive approach-treating growth, and a proactive approach-treating the source.

Reactive Approach-Treating the Growth
You can provide a temporary relief from algae by treating these algae break-outs with an algaecide like Pond Logic Algae Defense or Cutrine Plus Granular. It is best to treat the algae first, making contact between the chemical and the target algae as much as possible and then raking out the debris once dead. If the algae mat is more then an inch or two thick, you may want to rake out some of the algae before treating. To apply use a Tank Sprayer or Hand Spreader to kill off the remaining algae particulate. Once the treated algae dies and browns out, remove the debris with an Airmax Lake Rake so it does not sink the bottom of the pond and decay, encouraging new growth.

When selecting the type algaecide to use you will want to observe any use restrictions the product may carry. Algae Defense and Cutrine Plus granular are a popular choice as they do not carry any water use restrictions. . These products do however contain chelated copper which will not harm the pond or most common gamefish but are not as friendly to koi, goldfish or trout if carbonate hardness is less than 50ppm. You can test your carbonate hardness before treatment with a carbonate hardness test kit. If these types of fish inhabit your pond and you are looking for another option you may want to consider using Hydrothol 191. This product does carry some water use restrictions however it does not contain copper.

Proactive Approach-Treating the Source
Proactively treating your pond before you actually experience algae blooms can save you time and money in the long run. Algae blooms tend to be a symptom of a much larger problem – a dirty pond. By using only algaecides for pond maintenance you allow your pond to continue to accumulate organic debris and fuel for bigger and more stubborn outbreaks.
If your water temperatures are already around 50 degrees or above you can enlist the help of beneficial bacteria and natural water treatments to reduce organic debris and bind phosphates. Pond Logic PondClear can be used to treat your entire water column and attack floating suspended organics that cause turbid water. Pond Logic MuckAway sinks to the bottom of your pond to eliminate pond muck. Pond Logic EcoBoost naturally binds the phosphates helps sink floating particulates to increase water clarity. EcoBoost also introduces trace minerals into your pond which improves the health of your game fish. Remember to also run your Airmax Aeration System. Aerating your pond will ensure a healthy and well balanced pond for your fish during times of added stress while treating for algae, as well as to promote beneficial bacteria like PondClear to continue to breakdown any debris you may have missed while raking.

Pond Talk: Have you already experienced an algae bloom in your pond this season?

Pond Logic Algae Defense

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