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How are algae able to grow in the winter when everything else is dormant? | Ponds & Lakes Q&A

Q:How are algae able to grow in the winter when everything else is dormant?

Q: How are algae able to grow in the winter when everything else is dormant?

Patrick – Vandalia, IL

A: Algae can be tough little buggers. An estimated 72,500 algal species exist worldwide, and some of them can thrive in inhospitable conditions, including areas with ice and snow. With a handful of nutrients and a little bit of light, they’re able to grow – even in the 39 degree water under the ice in your lake.

But if your lake’s water is clean and clear during the spring and summer, how can it explode with algae in the winter?

Food Aplenty

Algae feed on byproducts of decomposing organic debris, like phosphorous and nitrogen, in the water. During the warmer months, natural bacteria would typically break down these nutrients, leaving little food for the organisms. But in the cooler months, those bacteria go dormant. That means the algae enjoy a feast – and a population explosion.

If you keep a hole in your lake’s ice, you can help control the nutrient density with a product like Pond Logic® EcoBoost™. This bacteria enhancer, which has no temperature restrictions, binds suspended organics while providing trace minerals to fish. Simply mix it with water and pour it into the lake.

Let There Be Light

Algae also require sunlight to thrive – but not much. Even through a clear, solid sheet of ice, algae can get enough light to use for photosynthesis. When that light is impeded, however, the algae won’t grow as quickly.

A layer of thick snow cover is Mother Nature’s way of preventing light from penetrating the water, but you can also use pond dye, to block those rays. The blue or black dye comes water soluble packets that are simple to use: Just toss two packets per acre into the lake, and the shade will inhibit algae growth.

Algae’s Benefits

Believe it or not, algae growth in the winter does have its benefits. It helps to filter the water, and on warmer days it’s a great snack for your fish. Plus, when the algae photosynthesize, they give off oxygen as a byproduct – which is then available for your fish (and other aquatic critters) to breathe.

Don’t worry: The algae won’t take over your pond like it does in the summer. It can grow, but the cold temperatures aren’t ideal for explosive outbreaks. If you’re concerned, however, try some EcoBoost and Pond Dye. They’re safe for your fish, and they’ll keep that algae under control until spring.

Pond Talk: Have you seen algae growing beneath the ice in your pond or lake?

Shade & Protect Your Pond - Pond Logic® Pond Dye Packets

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 60 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. Algae Defense® with Treatment Booster™ PLUS 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 Treatment Booster™ PLUS, 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 Cutrine®-Plus Granular . 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 weed cutter, raking with our Pond & Beach 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?

Do I Need To Fertilize My Plants And If I Do Will It Encourage Algae Growth? – Decorative Ponds & Water Gardens Q & A

Do I need to fertilize my plants and if I do will it encourage algae growth?

Do I need to fertilize my plants and if I do will it encourage algae growth? Ben – Shelley, ID

Here We Grow Again

Behind the scenes your Aquatic Plants are working hard to filter nutrients from the water in your pond, provide shelter for its residents, and keep algae blooms to a minimum. While this may seem impressive to some, it is hard for most pond owner to get excited about aquatic plants unless they can do all of this work while looking good. Whoever coined the phrase “Looks aren’t everything” obviously never owned a water garden.

If your aquatic plants are failing to impress you can use some plant fertilizer to give them the boost they need to ensure your pond has more buds and less duds this season. The type of fertilizer you use will depend on the type of plants in your pond and how they are implemented.

Liquid fertilizers like Microbe-Lift® Bloom & Grow™ are mixed directly into your pond water, providing a readily available food source throughout the entire pond. This type of application is great for ponds with an abundance of scattered plants, Floating Plants, and plants that are in areas lacking Planting Media.

Concentrated fertilizers like TetraPond® LilyGro™ Tablets and Laguna Fertilizer Pond Spikes are used for potted plants or plants with roots planted in media. Simply push these fertilizers into the planting media and they will gradually release nutrients that your plants. When you are using concentrated fertilizers in your pond, carefully read the directions for each individual product for specific application instructions and warnings. For example, when using LilyGro tablets you will want to place them about 3” away from the crown of the plant to ensure the fertilizer does not burn the roots or stem.

The amount of fertilizer you need and intervals at which you re-apply them will depend on which type you are using and variable factors such as average water temperatures and how many plants are in the pond. Applications can range from once a season to ever 2-4 weeks. Whichever type or brand of fertilizer you use in your pond make sure it is low in or completely free of phosphates which can encourage algae growth. Microbe-Lift Bloom & Grow is an entirely phosphate free product.

Fertilizing your plants will encourage increased growth and color in healthy plants to push them to perform at their best. Fertilizers will not be an effective substitute for gardening know how. If your plants are constantly dieing make sure they are being planted in the right Temperature Zone and are being used in the correct applications. Bog Plants like Dwarf Cattails for example should not be entirely submerged in your pond, tropical plants like Antares should not be planted in cold climates and so on.

Do some homework, read the descriptions and text included with your plants and fertilizers to ensure you select the correct products for you unique water gardening scenario. Once your aquatic plants are established and growing, you can then decide if you need fertilizer to give them a kick in the bud to bloom at their best.

Pond Talk:What aquatic plants do you use in your pond and which types of fertilizers do you use for them?

Fertilizer Pond Spikes


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