Parasites and ulcers pose significant health risks to pond fish. If ignored, they can result in an infestation and even the death of your ornamental pond fish. Banish Parasite & Ulcer Treatment swiftly, effectively, and safely addresses these issues while preserving the natural equilibrium of your pond. This koi fish medicine is a safe parasite remover and won't harm your prized koi or any other ornamentals. How to use: 1. Shake bottle, remove cap (measure side). 2. Squeeze to fill measure - 10ml of Parasite & Ulcer treatment per 225 litres (50 gallons) of pond water. Adding Treatment: Mix pond water and the treatment together in a bucket or watering can and add evenly over the ponds surface. Re-dosing: A further treatment can be added to your pond after 7 days. Remember to use Banish Filter Safe when topping up pond water. *Do not add treatments late at night or when the day is at its hottest. Leave pumps & waterfalls running.* Safe for use with pond filters. Treats 56,250 Litres (12,500 Gallons).