Simply-Clear Bacterial Pond Clarifier quickly clears your pond and then consumes, through natural bacterial action, phosphates and nitrates that cloud the pond. Simply Clear is a stable fast-acting bacteria that feeds on small-size organic compounds that cause cloudy water. As the bacteria rapidly grow they shed their outer coating which acts as a natural flocculent clumping fine particles. These fine particles then either drop to the bottom of the pond or are removed by the pond filter. The bacteria further consume these particles, further reducing the cause of cloudy water conditions. The bacteria in Simply Clear require phosphate and remove it from the pond water. Simply Clear bacteria will quickly clear pond water and digest and naturally eliminate the floating particles that cause water discoloration. Can be used in all ornamental koi ponds and water gardens and is formulated to work in both cold and warm water. Treats up to 4,000 gallons. Shipping weight: 1 1/4 lbs.