Dear friends,
We would love to hear about your current BioNova® projects. Please send Ryan, ryan@bionovanaturalpools.com, any information and pictures of your projects and we will gladly put them in the newsletter to share with all of the dealers. Thank you and we hope to see your inputs soon!
Here’s what’s happening at BioNova® Natural Pools North America…
Get to Know the Different Types of Algae in Natural Swimming Pools
As we know, there are several different types of algae that exist in both chemical and natural pools. We have recently had clients with questions on the different types and if that are harmful or not. Algae are a natural part of any water ecosystem, but an overgrowth can cloud the water, cause unpleasant odors, and make surfaces slippery and unsafe. Understanding the different types of algae that can occur in natural swimming pools is key to managing and preventing blooms without disrupting the delicate ecological balance.
1. Green Algae (Chlorophyta)
Appearance: Slimy green patches on surfaces, greenish tint in the water, or floating strands.
Causes: Sunlight exposure, warm water temperatures, and high nutrient levels (especially nitrogen and phosphorus) promote green algae growth.
Impact: Although not harmful, green algae can quickly take over if nutrient levels are not controlled. It often appears in early summer and can cloud the water or create slippery surfaces.
Prevention & Control:
- Increase circulation and aeration.
- Add more oxygenating plants.
- Manually remove visible algae with brushes or nets.
- Avoid nutrient buildup by limiting organic debris (e.g., leaves).
2. Blue-Green Algae (Cyanobacteria)
Appearance: Murky blue-green scum, often floating on the water’s surface or forming dense mats.
Causes: High temperatures and stagnant water with excess nutrients.
Impact: This is not true algae but bacteria that can produce toxins harmful to humans and animals. Cyanobacteria blooms are more common in unmanaged or poorly balanced systems.
Prevention & Control:
- Improve water circulation and oxygen levels.
- Avoid fertilizer runoff and organic pollution.
- Introduce shading plants to limit sunlight penetration.
Important Note: If cyanobacteria are suspected, avoid swimming until the bloom is identified and treated.
3. String Algae (Filamentous Algae)
Appearance: Long, hair-like strands growing on rocks, plants, or other submerged surfaces.
Causes: Shallow, nutrient-rich water exposed to sunlight and water flow.
Impact: While not toxic, string algae can entangle aquatic plants and reduce the visual appeal of the pool. It’s more common in spring and early summer.
Prevention & Control:
- Manually remove with a rake or net.
- Add barley straw or barley extract as a natural suppressant.
- Use biological controls like algae-eating insects or snails (in the regeneration zone).
4. Brown Algae (Diatoms)
Appearance: Thin, brown or yellowish coating on pool walls and floors.
Causes: Often appears in new pools or during colder months. It thrives in low-light conditions but is very beneficial for water clarification.
Impact: Not harmful, and is a great water purifier however it can make surfaces slippery and unattractive.
Prevention & Control:
- Brush and vacuum affected areas.
- Ensure proper oxygenation and plant diversity.
- Balance mineral levels (especially silica).
Conclusion
While algae are a natural component of any aquatic environment, excessive growth can compromise the aesthetics and safety of a natural swimming pool. By understanding the different types of algae and implementing ecological control strategies, pool owners can maintain a clean, healthy, and harmonious water garden. Regular observation and proactive maintenance go a long way in preserving the beauty and function of a natural swimming pool.
Stay Safe and Healthy.
We hope you all continue to stay healthy during these trying times and wish all of our BioNova® Dealers our best to you and your families.
Questions, Concerns, Thoughts
As always, we encourage you to contact us and share your thoughts, questions, and concerns with BioNova®. We are available to assist you in any way we can. Feel free to email me directly with photos, project updates, testimonials, etc., and we’ll include them in an upcoming Newsletter.
Respectfully,
Ryan Harmer
BioNova® Natural Pools
ryan@bionovanaturalpools.com
609-318-4707
