30 - 1/2 pound WSP packets. "Just toss in pond!" This product is uniquely blended to compete for nutrients that algae thrive on, improve clarity, and break down organic sediment in your pond. Initial application add 1.5 lbs per acre foot. Then a maintenance application of 1 lb per acre foot twice per month or as prescribed by your aquatic field representative. Watershed events and flow through are factors to consider when applying.