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Types of Algae and How to Control Them

Ponds, Water Feature Maintenance | October 28, 2021
Types of Pond Algae

While algae is a completely normal occurrence in most ecosystem ponds, excessive amounts of it can quickly become a problem. The goal is to keep your pond water clear while maintaining a small amount of algae, though this can be easier said than done. Dealing with excess algae growth can be a difficult task if you do not have the proper knowledge or tools. That is why the experts at Fontana Ponds & Water Features have compiled some information on the different types of algae and how to control them to help you maintain your pond’s delicate ecosystem.

Learn about some important autumn pond care tips.

Suspended Algae

Also known as floating algae, suspended algae can reproduce at a rapid rate, quickly turning water green and cloudy when left unmanaged. Due to the small size of the algae cells, most common filtration methods are too porous to catch and remove them. This form of algae is commonly referred to as ‘pea soup’ for the murky green water it produces.

Causes

Suspended algae blooms are typically caused by an imbalance in the pond’s water. An abundance of sunlight and excess nutrients can lead to issues with floating algae growth. Excess nutrients in the pond are often caused by having too many fish, overfeeding fish, stormwater runoff, or a lack of proper pond filtration. Suspended algae blooms often occur in the spring when the season is beginning to change, but the water remains at lower temperatures.

Prevention and Treatment

The addition of marginal pond plants such as pickerel, water lillies, and pennywort can help to reduce algae growth by competing with the algae for nutrients. Overfeeding fish throughout the season can also cause algae problems. Be sure to feed your pond fish no more than they can consume in five minutes or less. Any leftover food should be removed after feeding.

String Algae

String algae are filamentous algae often found attached to surfaces like rocks and plants in the pond. Excessive string algae growth can become frustrating if left untreated, so it is important to take proper precautions and treatment steps to prevent unchecked growth.

Causes

Much like suspended algae, an imbalance in the pond’s ecosystem and water will cause string algae to form. Excess nutrients and sunlight tend to be the most common culprits, though fish can play a role as well. String algae spores are durable and reproduce easily, making them slightly more difficult to eliminate once they have formed.

Prevention and Treatment

To prevent string algae growth, it is important to manage the nutrient levels in your pond. Do not overfeed your fish, remove uneaten food, and do not add more fish than your pond can realistically hold. If an abundance of string algae has formed in your pond, products such as Algaecide and the IonGen System G2 can be used to remove it.

To learn more about pond maintenance or to inquire about our installation services, get in touch with the experts at Fontana Ponds & Water Features. We can be reached through our online contact form and will be happy to answer any questions you may have.


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