algicides
/ˈæl.dʒɪ.saɪdz/
noun
- Substances used to kill or control algae, especially in water bodies like ponds, lakes, or swimming pools.
- We bought an algicide to keep our swimming pool water clear and free of algae.
- Some algicides are safe for fish, but others can harm aquatic life if used too much.
- The park service applied algicides to the lake to stop the green slime from spreading.