Check the listing for details. Cold Water Beneficial Bacteria ⅓ oz. Blocks - Fall Winter Maintenance. Condition: New. Listed at 34.99 USD. Cold Water Beneficial Bacteria ⅓ oz. Blocks - Fall Winter MaintenanceFor clean, clear, fresh smelling water. Use when water temperature is between 35°F - 60°FHeterotrophic Pond Bacteria and Enzymes in sinking dissolvable ⅓ oz. blocks.Heterotrophic beneficial pond bacteria in ⅓ oz. blocks new improved size increases coverageNaturally clears waterControls water problem causing phosphateReduces murky waterReduces pond water odorPromotes clean, clear, healthy waterPromotes fish healthMetabolizes fish wasteMetabolizes water problem causing fallen tree leaves and twigsMetabolizes water problem causing sludge and muckMetabolizes water problem causing proteins, cellulose, carbohydrates, and ligninNo unpleasant odorAll natural, no chemicalsNo artificial fillers or preservativesDissolvable sinking compressed salt tabletsHighly concentrated formula containing billions of beneficial bacteria per gramProprietary blend of 5 bacteria strains that produce multiple enzymesContains: Bacillus subtilis, Bacillus licheniformis, Bacillus amyloliquefaciens, Bacillus megaterium, and Bacillus pumilus bacteriaThe bacteria produce: Protease, Amylase, Ligninase, Lipase, Esterase, Cellulase, Xylanase, and Urease enzymes2 year shelf life Fall-Winter Maintenance™ cold water pond bacteria is recommended for use during the fall and winter seasons – typically from September through March. The bacteria, and the enzymes they produce go to work breaking down fallen leaves and other wind blown debris commonly associated with the fall and winter seasons.Fall-Winter Maintenance™ is also recommended for use in pondless waterfalls to help keep them clean, fresh smelling, and to help prevent algae growth.