Dosage: Initial dose 50 ml per 1,000 litres of pond water. Repeat every 5 days for 20 days. To apply add to a bucket of pond water, mix well and spread evenly over the surface of the pond. For smaller ponds use a minimum of 25 ml. Turn off UV lights for 48 hours after dosing. Pond Revive does not contain chemicals. It is a totally natural and safe way to revitalise a lifeless pond.