Blagdon Wildlife Barley Straw Bugs 1000 MlWorks like barley straw without the unsightly bales. Treats green water, algae and blanketweed ~ Falls outside of the biocides regulation that removed Barley Straw Extract ~ Consumes phosphate ~ Harmless to filters and all species of pond fish, plants and water using wildlife. Barley Straw Bugs is a formula created for treating ponds with green water, algae and blanketweed problems. Falling outside of the biocides regulation that the original Barley