Seachem Pond HealthGuard 480ml Fish And Plant Disinfectant For Ponds Promotes The Control Of Parasitic, Bacterial, And Viral Infections Of Fish And Plants In Ornamental Ponds Contains no malachite green or other dye based disinfectants that can discolor the water or quaternary disinfectants that foam Precaution; Safe For Most Fish Under Most Circumstances, Since Use Of Any Treatment Is Not Without Risk, It Should Not Be Used Carelessly 1 Liter Treats Between 2000 To 4000 Us Gallons