Applied Biochemists Swimtrine Plus, 1 Gallon, 406104A

The Applied Biochemists Swimtrine Plus, part number 406104A, is a concentrated copper algaecide for swimming pools, supplied here in a 1 gallon bottle. Its active ingredient is copper ethanolamine complex, and it is registered with the EPA under number 8959-28.

What it does

The registered label describes Swimtrine Plus as controlling algae and preventing its regrowth without requiring the pool to be closed. It lists the product as compatible with bromine, chlorine, salt water, ozone and mineral sanitizers. For black algae the label points to a separate Applied Biochemists product, then returns to Swimtrine Plus for regular maintenance once the black algae is under control.

How it is applied

The product comes concentrated and is diluted with at least nine parts of water before it goes in. The label has you pour the measured amount into a plastic watering can, fill it with water, and sprinkle the solution around the edge of the pool with the circulation running, ideally under sunny conditions. Directions are given as ounces per 10,000 gallons of pool water, with one rate for visible algae and a lower rate for prevention. Always apply chemicals separately and never combine them.

Before you order

The gallon is catalogued as 406104A, and the same bottle appears on older invoices as 406104. Follow the directions printed on the bottle you receive, because labels are updated as registrations are reviewed.