Ecological Laboratories Microbe Lift Mean Green Combo Pack, 8 lb. Mean Green Algae products in 1 handy carrying case get tough on algae with Ecological Laboratories Microbe-Lift/PL-the #1 selling bacterial pond additive on the market-with Green Clean, an EPA Registered granular algaecide! Three days after its usage, apply Microbe-lift/PL to make the dead algae completely disappear by degrading it to carbon dioxide and water! Keep the water crystal clear and help establish and maintain efficient nitrification