Blanketweed is an unsightly problem, which, effects many ponds. If lets untreated, blanketweed can not only look unpleasant, but it can clog pond pumps resulting in them working less effectively. Stop this problem with Bermuda Banish Blanketweed. This effective and easy to use treatment will banish blanketweed quickly and safely, without disturbing your ponds natural balance. 250ml will treat ponds up to 11365 litres/ 2500 gallons.