Reservoirs, Lakes and Ponds


Hydrothol Granular provides control of both weeds and algae. Used primarily as an algicide at rates of 0.05-0.3 ppm, it provides excellent control of a broad spectrum of algae including planktonic, filamentous, and branched algae. It works relatively quickly providing algae control in a few days. There are no restrictions on treated water used for swimming, fishing or irrigation*.

*Read and follow label directions.


Hydrothol® Granular Facts:

  • Minimal water use restrictions*
  • Controls both weeds and algae
  • Works quickly
Always read and follow label directions. For more information, read labels and other resource material.

Active Ingredients

11.2% Mono(N,N-dimethylalkylamine) salt of endothall*
88.8% Other Ingredients
100% Total

*7-oxabicyclo [2.2.1] heptane-2,3-dicarboxylic acid equivalent 5%


Reservoirs, Lakes and Ponds