Naturally clears green water and blanketweed from ponds. This product works at least 1 month quicker than ordinary barley straw and is far easier to control.

The extract provides the by-product of the straw breakdown that kills algae.

Extract of Barley Straw is harmless to all vascular plants and all water born wildlife.

250 ml treats 1000 gallons for 6 weeks

Blagdon Pond Barley Straw Extract 250ml