STOP Blanketweed from Evolution Aqua is to be used only in the treatment of filamentous algae, commonly known as blanket weed in ornamental and garden ponds. Blanket weed is one of the most hated problems of pond keeping and a nuisance to everyone as it makes your pond unsightly, blocks filters, pumps and pipes. STOP Blanketweed is a unique product which will kill & prevent the regrowth of blanket weed if used as instructed. - STOP Blanketweed is easy and simple. - Contains no harmful chemicals. - Safe for all pond inhabitants. - Stop Blanketweed inhibits the growth and reproduction of blanket weed. Stop Blanketweed is available in sizes of: * 1kg which is suitable for ponds up to 10,000 litres or 2,200 gallons, * 2.5kg containers suitable for 25,000 litres or 5,500 gallons and * 4kg containers for 40,000 litres or 8,800 gallons. Directions for use: Mix the calculated amount of Stop Blanketweed thoroughly with pond water in a suitable clean container. Now distribute this mixture evenly over the pond surface. Add this dose once per week until the blanketweed has gone. Continue to dose once a month to prevent the blanket weed from returning. If water temperature is below 8 degrees celsius, treatment efficiency is reduced.