Pond Keeper liquid beneficial bacteria contain several strains of naturally occurring beneficial bacteria ideal for breaking down and digesting waste commonly found in pond environments to naturally keep ponds clean, clear and health all year long. Pond Keeper beneficial bacteria: • Breaks down organic sludge like leaves, dead plants, fish droppings, fish food, fertilizer and dead algae • Creates a clean, clear pond • Diminishes nutrient overload • Reduces odors • Harmless to fish, animals and turf plants Our liquid beneficial bacteria additive is ideal for koi ponds, water gardens, fountains and other ornamental ponds.