Interpet Koi Anti-Fungus and Bacteria is ideal for use in a Koi pond where Koi and goldfish are the sole inhabitants. It is a unique powerful treatment based on several active ingredients that act against: Fungus(Saprolignia sp. and Achlya sp.)Finrot and Mouthrot causing bacteria, (Myxobacteriasp. and Flexibacter sp.)This is a five day course of treatment to slowly build dosage levels in the pond which maximizes the effect of the treatment whilst minimizing stress on the fish.*Do not use with Orfe, Rudd or Tench.*Available in 2 sizes: - treats 9,092 litres (2,000 gallons).