Barley Straw Barley Straw For Clearer Pond -- Can I Place Them At Bottom Of Pond?

Barley Straw for Clearer Pond -- Can i place them at bottom of pond? - barley straw

My pool is green and I think to get barley straw, small pieces of bushels of abseiling and their networking and related rocks on the pond bottom (the surface). Wil will prevent the formation of algae or barley straw HTE, should be near the surface where algae forms?