Interpet Aquarium Anti-Fungus & Finrot No.8 100ml This 100ml bottle is sufficient to treat of 500 Litres (100 gallons). Cures fish of fungus, mouthrot and finrot. Does not colour the aquarium water. Harmless to filters and all species of fish and plants. There is a handy pipettte and measuring cup, there is also a chart to calculate the required dosage as well as a chart to aid diagnosis of alternative fish problems. Price: £4.29 Quantity: