Blagdon Pond Goldfish Treatment is a Broad Spectrum Treatment for goldfish Harmless to filters and all species of pond fish, plants and water using wildlife. Blagdon Pond Goldfish Treatment is an ideal all round treatment, which will cure most common parasite, fungal, and bacterial infections. Ideal for use when the diagnosis of a fish disease is difficult of the consumer is inexperienced at identifying fish disease problems.Use When: Mouth and fins appear to be rotting away White cotton wool growths are visible Fish flick against solid objects Fish gasp at the surface Fish appear to be covered in slime or white spotsActs Against: External fungus, bacteria, white spot and slime parasite problems This is a course of treatment: the pond should be treated every day at roughly the same time, for 5 days250ml : 5 dose course of treatment for 2250 litres (500 gals)1000ml (1 litre) : 5 dose course of treatment for 9000 litres (2000 gals)