All ponds are susceptible to algae growth and greenwater, which can not only spoil the appearance of the water but also obstructs filters and disrupts oxygen levels. However, with the application of Banish Barley Straw Extract, you can effectively and safely control unwanted algae growth. This pond weed remover is all natural and wildlife safe, ensuring it will clear the pond water without disturbing its natural balance. To use, simply shake the bottle and remove the cap (measure side). Squeeze to fill measure (10ml of treatment per 225 litres of pond water). Mix pond water and the treatment together in a bucket or watering can and add evenly over the pond surface. A further mix can be added to your pond after 5 days. Remove any blanketweed as it appears and use Pisces Sludge Treatment to remove pond waste. Specifications 250ml bottle Treats: 5680 Litres (1250 Gallons).