ACCURATE NO MESS DOSING CHAMBER - just calculate the amount required for your pond, squeeze the required amount into the dosing chamber and administer according to instructions on bottle (this bottle treats 2,273 litres over the 5 day period). SHAKE BOTTLE WELL - shaking the bottle well before ensures the active ingredients are mixed correctly for best results for a fast fish recovery time (treat at first signs of infection). Discolouration of your pond water should be expected, but this only lasts for a few hours!. WILDLIFE SAFE - Blagdon Anti-Fungus and Bacteria Treatment is safe for treating all goldfish, koi and carp and is also safe for wildlife. SAFE DOSAGE LEVELS - this treatment is designed to be added over a 5-day period to build up dosage levels for best results. EFFECTIVE CONCENTRATED FORMULA -use for treating goldfish, koi and carp pond fish for fungal and external bacterial infections such as: cotton wool fungus, fin rot and mouth rot fungus.