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Cyanobacteria, also called blue-green algae, are microscopic organisms found naturally in all types of water — fresh, brackish (combined salt and fresh water), and marine. These single-celled organisms use sunlight to make their own food.
Cyanobacteria blooms can start to multiply very quickly. They form in warm, slow-moving waters that are rich in nutrients from sources such as fertiliser runoff or septic tank overflows, and are often associated with excess sludge and sediment buildup in lakes and ponds. Blooms can appear at any time, but most often form in late summer or early autumn.
Cyanobacterial blooms are a significant public health issue, particularly through summer. Cyanobacteria produce a variety of toxins — including hepatotoxins, neurotoxins and dermatoxins — which are harmful to humans, pets and livestock. Rapid identification and control is essential.
You might or might not be able to see cyanobacteria blooms. They sometimes stay below the water’s surface, and sometimes float to the top. Some blooms look like foam, scum or mats, particularly when wind blows them toward a shoreline. The blooms can be blue, bright green, brown or red, and sometimes resemble paint floating on the water’s surface. As cyanobacteria die, the water may smell bad, similar to rotting plants.
Cyanobacteria require specific treatment — copper-based and oxidising algaecides labelled for cyanobacteria control are the fastest knockdown options. Long-term, our lake and pond treatment programme targets nutrient overload, while effective aeration reduces odour and restores oxygen balance during and after a bloom.
Not sure which type of algae you’re dealing with? See our algae control overview for help distinguishing cyanobacteria from filamentous and planktonic algae.
Cyanobacterial blooms are a significant public health issue, particularly in summer Cyanobacteria (blue-green algae) produce a variety of toxins such as hepatotoxins, neurotoxins and dermatoxins which are detrimental to human and animal health.
Use REGEN-CyaNo® to control Cyanobacteria. REGEN-CyaNo® is a granular algaecide that can be used to spot-treat targeted areas.
Approved for the selective control of cyanobacteria in lakes, ponds, potable water, aquaculture and wastewater, REGEN-CyaNo® active ingredient creates a powerful oxidation reaction that destroys algal cell membranes and chlorophyll, providing immediate algae control.
REGEN-CyaNo® is the ideal choice to keep your lakes, fishing and farm ponds, aquaculture sites, and other private water bodies pleasing to the eye and safe.
Many water bodies are threatened by excessive nutrients entering through lawn and garden run-off, construction sites, wastewater discharges, detergent wastes, septic tank seepage and agricultural run-off. Excessive nutrients support the dynamic growth of cyanobacteria (blue-green algae) and other aquatic algae, interfering with intended water uses and sometimes presenting health hazards to humans and animals. REGEN-CyaNo® is the choice to keep your lakes, fishing and farm ponds, sites and other private water bodies, safe for your enjoyment. REGEN-CyaNo® creates a powerful oxidation reaction that destroys algal cell membranes and chlorophyll, providing immediate control of algae. For best results apply early when algae growth first appears.
Professional Strength Oxidizer is a highly effective Algaecide, Fungicide, and Bactericide
Effective on a wide variety of algae, and Cyanobacteria
– Immediate algae control and reduced toxicity
– More effective than copper sulphate
– No run-off concerns
– Can be used in irrigation canals and reservoirs
– Proven safe for all crops
– A great alternative to copper-based products.
Irrigation water/Surface water
Cyanobacteria or commonly known as (Blue Green Algae): 1 – 30g per m³ – broadcast granules over the entire volume of water.
Spot Treatment: Apply REGEN-CyaNo® directly over the cyanobacteria-covered area. Retreat with heavy growth.
See Product Label and Safety Data Sheet for all usage directions. Use only as directed.
MAXIMUM Dosage Rate by Volume
| Volume | 1m3 | 10m3 | 100m3 | 1000m3 |
|---|---|---|---|---|
| Dosage | 1 – 30g | 10 – 300g | 0.1 – 3kg | 1 – 30kg |
REGEN-Alguard® is a commercial-grade liquid chelated copper-based algaecide, used for the safe, rapid and effective control of a broad spectrum of filamentous and planktonic algae. REGEN-Alguard® is up to 80% less copper than current (copper-based) algaecides and is widely used to control algae in lakes, irrigation dams, decorative ponds and more. REGEN-Alguard® will not harm fish, livestock, plants, pastures or turf (when used in accordance with label instructions).
REGEN-Alguard® works by weakening cyanobacteria and algae cells. Copper ions stop photosynthesis causing the cells to die and dissolve into the water. There is minimal harm to organisms in the water. Residual toxins are rapidly biodegraded. REGEN-Alguard® rapidly disperses throughout the water body without settling to the bottom or floating on top like other copper-based algaecides.
Apply in a manner that will ensure even product distribution within the treatment area. Retreat areas if regrowth begins to appear or if seasonal control is desired. Repeating application of this product too soon after initial application may have no effect. Treatment of aquatic weeds and algae can result in oxygen loss from the decomposition of dead biomass. This oxygen loss can cause fish and invertebrate suffocation. To minimize this hazard, do not treat more than ½ of the water body and wait at least 14 days between treatments to avoid depletion of oxygen. Begin treatment along the shore and proceed outwards in bands to allow fish to move into untreated areas. Application of algaecides to high-density blooms of cyanobacteria can result in the release of intracellular contents into the water. Some of these intracellular compounds are known mammalian hepato- and nervous system toxins. Therefore, to minimize the risk of toxin leakage, manage cyanobacteria effectively in order to avoid applying this product when blooms of toxin-producing cyanobacteria are present at high density. Certain water conditions including low pH (≤6.5), low dissolved organic carbon (DOC) levels (3.0 mg/L or lower) and “soft” waters (i.e. alkalinity less than 50 mg/L) increases the potential acute toxicity to non-target aquatic organisms. The application rates on the label are appropriate for water with pH values > 6.5, DOC levels >3.0 mg/L, and alkalinity greater than 50 mg/L. Avoid treating waters with pH values <6.5, DOC levels <3.0 and alkalinity less than 50ppm (e.g., soft or acid water), as koi, trout and other sensitive species of fish may be killed under such conditions.
MAXIMUM Dosage Rate by Volume
| Volume | 10m³ | 100m³ | 1,000m³ |
|---|---|---|---|
| Dosage | 20 – 90 mL | 0.2 – 0.9 L | 1.8 – 9.2 L |
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