AlgimycinPWF

SePRO · Copper · EPA Reg 67690-91 · Insecticide Document last checked 2026-05-30

According to the label From the product label

These details were extracted from this product's label PDF. The label is the law. Confirm every rate, site, restriction and safety requirement against the label before mixing or applying. Check for a state supplemental label; a product may be restricted or prohibited in a state or site even when a rate appears below. · EPA registration data for Reg. 67690-91 →

Algimycin PWF is a liquid, water-soluble copper formulation used as an algaecide and cyanobacteriocide. It is designed to control a broad range of algae and cyanobacteria in potable water reservoirs, ponds, lakes, and irrigation conveyance systems such as ditches, canals, and laterals. The active ingredients are chelates of copper gluconate (12.5%) and chelates of copper citrate (12.9%), containing a total of 5% copper. The product is effective in various water conditions, though its toxicity to non-target aquatic organisms increases in soft waters (alkalinity less than 50 mg/L) or waters with low pH (≤ 6.5) and low dissolved organic carbon. When using the product, technicians must ensure even distribution, especially when treating floating mats or scum. It is critical to avoid over-application; for drinking water, applied metallic copper must not exceed 1 ppm. Users should be aware that treatment can cause oxygen depletion in the water column due to decaying vegetation, so monitoring dissolved oxygen is recommended. Handling requires specific PPE to prevent skin and eye irritation.

Pests covered (1)

Algae and Cyanobacteria

Areas treatable (1)

Reservoirs, ponds, lakes, irrigation conveyance systems, ditches, canals, & laterals

Application instructions from the label 1

Reservoirs, ponds, lakes, irrigation conveyance systems, ditches, canals, & laterals

Do not use in water containing Koi or hybrid goldfish. Not intended for small volume, garden pond systems.

Target pest: Algae and Cyanobacteria
Location: Both

Mixing instructions 1

For pests	Finished strength	Label notes
Algae/Cyanobacteria	Varies based on target species and growth form	Dosage is determined using Table 1 (by genera) and Table 2 (by growth form/abundance) to find the required PPM, then converted via Table 3.

Worker safety

PPE required Long-sleeve shirt, long pants, shoes and socks, and waterproof gloves.

Timing & weather

Begin applications early in the season when algae/cyanobacteria problems become evident and water temperature is above 60°F (15.6°C).
Avoid application during temperature inversions or when wind speeds are greater than 15 mph.
In winter, treat 6-8 weeks before freeze.

Use restrictions 6

Do not use in water containing Koi or hybrid goldfish.
Not intended for small volume, garden pond systems.
For drinking water, applied metallic copper must not exceed 1 ppm.
Do not exceed 1.0 ppm copper dosage rate.
Do not treat more than 1/2 of the water body to avoid oxygen depletion.
In regions where ponds freeze in winter, treat 6 to 8 weeks before expected freeze time.

Label SDS

Catalog source document available. The local copy is still withheld until its exact product identity, role, and full file hash are accepted. Open the catalog source label ↗ and verify the product name, EPA registration number, and revision before relying on it.

Publication withheld. This catalog record has no active evidence summary, so its document and any extracted directions remain unavailable while identity and document role are reviewed.

Document text and citations

Extracted text is retained internally for document review and page-level citation checks. The complete third-party text is not republished here; use the document viewer above.

Reference only. Always read and follow the most current EPA-approved label on the product container. State and local restrictions may apply that are not reflected in this digitised copy. Verify the EPA registration number and revision date before use.