You will notice some strange sausage like items floating around the edges of the fishery, inside these sausages is barley straw. The idea is that the barley straw will break down in the water producing a chemical that reduces algal growth and counters algal blooms. The other theory is the barley straw provides habitat for phytoplankton which in turn eats the algae and reduces it. Personally i’m not sure which is true or if it works at all, however historically it has always benefited the lakes and if nothing more will provide great habitat for minnows and bullhead.
p.s  Dont worry it will sink!

Simon