Pond Boss, 16 OZ, Algaecide, Great For Preventing Algae From Blooming In Or Around Your Backyard Pond Or Water Garden, Fast Acting, Completely Non-Toxic So It Will Not Harm Your Fish Or Water Plants, Recommended For Small To Medium Size Ponds & Water Gardens, Treats, Controls & Prevents Algae, Meets National Organic Program Standards, Will Not Harm Fish Or Live Ornamental Plants, For Use On Water Gardens, Waterfalls, Pondless Waterfalls, Ornamental Ponds & Fountains.