enjoy A Crystal-clear Pondeasy-to-applyeffective For A Whole Seasontake Pride In Your Garden Pond, Full Of Clear Water Which means that you can See Your Prize Fish & Other Aquatic Life To The Full.this Easy-to-apply Extract From Barley Straw Is Mess-free & Effective. The Extract Produces Bacteria & Enzymes Which Inhibit The Algae & Blanketweed Which Cause Your Pond To Green Up In Sunlight.harmless To Fish & The Environment, This Natural Solution Gives You Peace Of Mind. Biodegradable & Non-toxic To Humans, Beneficial Soil Organisms & Wildlife.see Instructions For Dosage & Use On Bottlefor A 13 square Foot Pond, 9 Inches Deep (around 1000 Gallons).