Provides an added boost of treatment for seasonal spikes in your pond"s nutrient level due to hot weather, excessive runoff, etc. Blast accelerates the decomposition of organic matter through a non-toxic, proprietary blend of beneficial bacteria. Best used in conjunction with the Healthy Ponds® AquaSpherePRO, Floating Lily, or Submersible Dispenser. Includes 5 pre-measured, easy-to-dispense 15 gram water soluble packets. Made in USA.