Product Overview

Starry Stonewort, the macro-algae that invades lakes, harms native species, and inhibits water activities.

“The most significant characteristic of this species is that it is predictably unpredictable. It will bloom and decline without warning.”

- Dr. Douglas Pullman, Sr. Aquatic Plant Scientist - Applied Biochemists

A premium solution, Cutrine® Ultra Algaecide/Herbicide/Cyanobactericide is emulsified with penetrating surfactant which allows increased activity on ‘hard to control’ algae. Highly effective at controlling coarse (thick cell-walled) filamentous algae, mucilaginous (colonial) planktonic algae, Chara and copper-sensitive vascular aquatic plants.

  • Visible reduction in algae growth in 1 – 2 days after application
  • Double chelated formula prevents the precipitation of copper with carbonates and bicarbonates in the water
  • Emulsified with penetrating surfactant which increases activity on ‘hard to control’ algae


Make sure the Applied Biochemist (AB) brand of products in your inventory are currently approved and registered for use in your state.

The Applied Biochemist brand products purchased by SePRO have been in transition from a regulatory process since the acquisition. All are federally registered and all existing AB factory manufactured (non-SePRO manufactured) inventory remains registered. Please visit to check for registered states.

Some of the new SePRO facility produced brand of AB products are still waiting for state registration approval. Although federally approved for many months, state registrations are still required and in process. State registrations are being updated daily. Please visit for the most up to date information. To check the current state registration status for a SePRO brand AB product, choose a product and click “REGISTERED STATES”.

Product Information Sheet

Labels and SDS

Specimen Label

Safety Data Sheet

Registered States


In still or slow waters, dilute the product with enough water to ensure even distribution and spray onto the treatment area. For moving waters, apply using drip irrigation or injection and continue treatment until waters at downstream area reach desired copper concentration.

The product can also be applied via drip system in flowing waters. See the ‘Field Reference Sheet’ for more information.

For use in: lakes, ponds, water features, fish hatcheries and decorative water features with little or no outflow.


Waters treated with this product may be used for swimming, fishing, further potable water treatment, livestock watering or irrigating turf, ornamental plants or crops immediately after treatment. Do not use in waters containing Koi and hybrid goldfish. Not intended for use in small volume, garden pond systems.

Before & After


"It's the best and only chelated copper I have ever and will ever buy."

Professional Applicator / Limnology Information & Freshwater Ecology

Experts in Aquatic Solutions

SePRO’s Technical Specialists are trained to assist you with your toughest issues, from aquatic weeds that keep coming back to nusiance or toxic algae that are plaguing a water body. See how we can help.