Evolution Aqua Pure Bale In A Bottle Barley Straw For Ponds With Beneficial Bacteria 1000mlMaintain a clean, balanced pond environment with our Barley Straw Gel, enhanced with live beneficial bacteria. Made using matured barley straw extract, this powerful, natural formula works quickly to improve water claritywithout the hassle of traditional barley straw bales. The shake to activate gel is designed for faster results, helping to keep your pond water clear while remaining completely safe for all aquatic life. The 1 litre size is perfect