CrystalClear, 8 OZ, Foam-B-Gone Anti-Foam, Will Remove Foam From Water Within Seconds Of Application, Foam Is Usually Caused By Excessive Organics Present In Pond Water, Protein Foam Can Be Harmful & Should Be Removed Quickly, For Use In Ponds, Fountains & Statuary, Safe For All Aquatic & Domestic Animals, 8 OZ Bottle Treats 8,000 Gallons.