Don’t let colder winter temperatures keep you from taking care of your pond! With Microbe-Lift Autumn Winter Prep Aquarium Water Care， you’ll be ready and prepared for a lovely spring after the snow melts. Formulated to help accelerate organic debris decomposition during the fall and winter months， Microbe-Lift uses liquid bacteria and dry， water soluble packets with a special blend of enzymes and bacteria to clean your pond. Better yet， your precious fish will have a sustained， healthy environment during those chilly temperatures， including water temperatures under 40F.