Pond Boss® 54291 2 1/2 gal Algaecide/Bactericide - This algaecide/bactericide is formulated to prevent algae from building up in your water feature. It is designed to be applied in lakes, ponds, impounded waters, wastewater lagoons, reservoirs, livestock watering systems, potable water supplies and sedimentation basins. It can be properly used in irrigation conveyance systems, irrigation reservoirs, irrigation canals, irrigation ditches, feedlot run-off lagoons, animal waste or confinement pits, and organic sludge pits.