SeaChem Pond HealthGuard 500ml

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 discolour or quaternary disinfectants that foam. Used as directed, it is safe for fish, plants, and the biological filter. A 2 Litre size treats over 4,000 gallons.