New extract of barley straw an eco friendly pond product to remove algae and blanket weedfaster acting than conventional barley strawnatural barley straw extract eco friendly solution to the problem of green water and blanket weed in ponds enhances pond water chemistry to prevent pond water turning greenextract of barley straw contains no synthetic chemicals or artificial pesticides it can be used in any type of pond and with any species of fishinitial dose125ml per 4 500 litresmaintenance