EcoBlastTM is Aquascape"s #1 treatment for breaking down debris! Quickly start using EcoBlastTM to spot treat the trouble areas in the pond and follow up with S.A.B.TM Extreme on a monthly basis to help keep it clear! Fast Acting! EcoBlastTM is not temperature sensitive and can be used during colder temperatures. 100% safe for fish. 7 lbs treats up to 2,275 sqft.