Features Safe disinfectant to promote the control of parasitic, bacterial, fungal, and viral infestations Will not discolor water or cause foaming Plant safe Overview Pond HealthGuard™ is a safe disinfectant to promote the control of parasitic, bacterial, fungal, and viral infestations of fish in ponds. It contains no malachite green or other dye based disinfectants that can discolor or quaternary disinfectants that foam. Used as directed, it is safe for fish, plants, and the biological filter. A 2 Liter size treats over 4,000 gallons.