Harmful Algal Blooms are an annually recurring major environmental problem worldwide. Harmful Algal Blooms are caused by a sudden intensification of the cyanobacterial population in water bodies. Cyanotoxins accumulate in drinking water as well as in the aquatic food chain and they can also spread through airborne aerosol particles to nearby regions.
They pose immediate and prolonged risks to humans and animals that depend on these resources.

Harmful Algal Blooms are a significant concern throughout the world. Algal blooms, or blue-green algae, occur in freshwater, while in saltwater, they are referred to as “red tides”. Harmful Algal blooms occur more frequently in warm temperatures but can occur all year long.

Our vision is to make water safe again through the eradication of Harmful Algal Blooms.

We currently have 5 facilities worldwide; our HQ and R&D facilities are located in Israel, and we have branches in the US, China, South Africa, and Russia.

Lake Guard® Blue is a smart floating technology composed of 95% (w/w) copper sulfate pentahydrate encapsulated in an inert, biodegradable agent. It is approved by the U.S. EPA and certified by the NSF/ANSI/CAN 60 standard for treatment in drinking water.

Lake Guard® Oxy is a smart floating technology, time-releasing formulation of 86% (w/w) sodium percarbonate that releases hydrogen peroxide (H2O2) as its active ingredient. It is approved by the U.S. EPA and certified by the NSF/ANSI-60 standard for treatment in drinking water.

Yes, many successful documented treatments were performed over the years. Our website contains many case studies showcasing some of our deployments.

You are welcome to contact our sales team for any inquires, including application services, guidance, and large purchases: International – info.bgtechs@.com /USA – US.Sales@bgtechs.com /South Africa –SA.Sales@bgtechs.com /China – China.Sales@bgtechs.com/ Israel- Israel.Sales@bgtechs.com/ Russia- Russia.Sales@bgtechs.com.
The ready-to-use
, 10 lb. granular Lake Guard® Blue is available for purchase on Amazon for US residents. (Link)

Harmful Algal Blooms are heavily affected by human activities and result in major ecological disturbances, contaminating entire water bodies and harming most living organisms that rely on them. In extreme cases, cyanobacterial blooms create “aquatic dead zones” where oxygen is depleted, resulting in mass mortality of aquatic fauna. 

Like the human body that requires medication to recover from a disease, an infested water body requires treatment. Our Lake Guard® line of products relies on hydrogen peroxide and copper sulfate as the first line of treatment. Each is a US EPA-approved algaecide. They have been studied for many years – and have been found to be selective for cyanobacteria and a minor disturbance for the ecosystem, especially in comparison with the alternative, which is a full-blown Harmful Algal Bloom. The advantage of the floating and slow-releasing Lake Guard® formulation is highlighted through the ecological prism, as it leverages an effective and selective treatment while creating the conditions that allow smaller doses to be administered with much higher precision than ever before. Field trials with the Lake Guard® products have demonstrated that parallel to the decline in cyanobacterial cell mass in the waterbody, an increase in non-toxic and competing green algae was registered, indicating that the ecosystem was undergoing a healthy transformation whereby natural competitors of the cyanobacteria took control over the ecological niche.

Ready To Use ( Available now on Amazon)

All relevant information regarding the limitations and safety measures is located on our product label. Please read the label before product application. Additional information can be found on the product SDS (Safety Data Sheet). Ready to use,10 lb. granular Lake Guard® Blue is available for purchase on Amazon for US residents. (Link)

The Lake Guard® products are best used in ponds and lakes over 0.5 acres in size with an average depth of 3 ft.

It depends on application methods and other factors, but we generally recommend the morning hours.

Dose is dependent on the algal bloom conditions in the water. Normally, in case of a visible bloom, a dose of 10 lb/acre should solve the problem. For a preventative treatment, use 1 lb/acre when water clarity is reduced and/or pH levels rise to above 8. In ponds with fish and a visible bloom, extend the application of the recommended dose over 2-3 days to avoid mass-algal decomposition and subsequent oxygen depletion. If you have aerators/fountains in the pond, keep using them throughout the treatment and 48h after.

The Lake Guard® products rehabilitates contaminated lakes in days, making the water safe, and delivers first visible results within 24-48 hours, sometimes even faster.

After application, the product will float towards the region where the blooms are concentrated and time-release the active ingredient. Improvement in the water can be observed within hours and throughout the days to come. In case of an algal bloom, one should abide by local authorities’ advisories and recommendations for water use. Regarding the use of the Lake Guard® , there is no need to suspend recreational activities during treatment. Boating activities can continue as planned. However, for extra caution, we recommend that swimming activities be suspended for several hours after treatment, especially during the first major treatments intended to bring down cyanobacterial concentrations to manageable levels. 

Yes, the Lake Guard® products are approved by the U.S. EPA for any waterbody, and certified by the NSF/ANSI/CAN 60 standard for treatment in drinking water.

Yes, the Lake Guard® Blue is approved by the U.S. EPA for any waterbody and certified by the NSF/ANSI-60 standard for treatment in drinking water. For applications in waters destined for use as drinking water, the waters must receive additional and separate potable water treatment. Do not apply more than 1.0 ppm as metallic copper in these waters.

No, it is not. Although Lake Guard® products are being used to maintain taste and odor issues in the aquaculture industry (that are caused by blue-green algae), the product is not safe for use in ornamental fishponds. The reason is that these types of fish are highly sensitive to any change in water parameters, including pH.

Yes, the Lake Guard® products can effectively treat any phytoplankton species, including all algae and cyanobacteria. It will not affect water plants (e.g., hyacinth or duckweed).

Lake Guard®️ Oxy

Lake Guard®️ is readily available to be dusted manually, from the shore, a boat or from the air, depending on the size of the lake. It does not require a full lake application, this translates into a very short lead time, even in places where the Lake Guard®️ is not stocked.

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Lake Guard®️ Blue

Lake Guard®️ was designed to fuse market-approved, well-validated algaecides with a novel delivery mechanism thereby removing all pre-existing limitations in terms of feasibility, affordability and eco-friendliness.

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Lake Guard®️ Blue Now Available on Amazon!