Check the listing for details. Microbe-Lift� Concentrated Barley Straw Extract. Condition: New. Listed at 21.99 USD. Get the same powerful algae deterrent power of barley straw without the mess or unsightly residue! Microbe-Lift® Concentrated Barley Straw Extract is an environmentally responsible, cost-efficient pond conditioner that provides a clean, easy and organic approach to a healthy pond environment.One capful is equal to multiple barley straw bales -- without the messGoes to work on contact with immediate decompositionEspecially helpful where bottom drains are presentSafe for fish, plants, humans and pets!Can be used year-roundApplication RatesPond Size (Gallons)Initial ApplicationTreatment (Weekly)Maintenance (Monthly)0 - 5002oz0.5oz0.75oz501 - 10003oz0.75oz1.25oz1001 - 15004oz1oz1.5oz1501 - 20006oz1.25oz1.75oz2001 - 30008oz1.5oz2.25oz3001 - 400010oz2oz3oz4001 - 500012oz2.5oz3.5oz5001 - 600016oz3oz4oz6001 - 700020oz3.5oz4.5oz7001 - 800024oz5oz6oz8001 - 10,00032oz6oz8oz