Abstract: Provided herein is a method for reducing down-time in a recreational body of water having a water filtering system and water recirculation system after a potential release of Cryptospridium oocyst and/or Giardia cysts. Also described is a kit for practicing the method for reducing down-time in a recreational body of water that may have a potential release of Cryptospridium oocyst and/or Giardia cysts.

Abstract: Provided herein is a method for reducing down-time in a recreational body of water having a water filtering system and water recirculation system after a potential release of Cryptospridium oocyst and/or Giardia cysts. Also described is a kit for practicing the method for reducing down-time in a recreational body of water that may have a potential release of Cryptospridium oocyst and/or Giardia cysts.

Abstract: The present invention is directed to a composition for treating recirculating water systems, comprising: (1) a biocidal effective amount of a first nonoxidizing biocide comprising biguanide; and (2) a biocidal effective amount of a second nonoxidizing biocide comprising dibromonitrilopropionamide (DBNPA); wherein the composition is substantially free from oxidants. The present invention is also directed to a method of controlling the growth of microorganisms in recirculating water systems, comprising the step of treating the recirculating water systems with the above composition.

Abstract: The present invention is directed to a composition for reducing the levels of microorganisms in recreational water systems, comprising: (1) a biocidal effective amount of dibromonitrilopropionamide (DBNPA); (2) optionally, a biocidal effective amount of an algaecide selected from the group consisting of didecyldimethylammonium chloride (DDAC), zinc, and copper; and (3) optionally, a compound capable of in situ activation to form an oxidizing agent; wherein the composition is effective for reducing the levels of microorganisms in recreational water systems. The present invention is also directed to a method of controlling the growth of microorganisms in recreational water systems, comprising the step of providing the above composition; and adding the composition to a recreational water system.

Abstract: The present invention is directed to a composition for treating recirculating water systems, comprising: (1) a biocidal effective amount of a first nonoxidizing biocide comprising biguanide; and (2) a biocidal effective amount of a second nonoxidizing biocide comprising dibromonitrilopropionamide (DBNPA); wherein the composition is substantially free from oxidants. The present invention is also directed to a method of controlling the growth of microorganisms in recirculating water systems, comprising the step of treating the recirculating water systems with the above composition.

Abstract: The present invention relates to a method of inhibiting the growth of killing algae, bacteria, yeast and/or fungi in a recirculating water system which comprises adding to the water a polymeric biguanide and an adjuvant of the Formula (1) or a salt thereof: wherein: R1 is an optionally substituted C8 to C12 or C18 to C22 alkyl group; and R2 and R3 each independently is H or optionally substituted C1-4-alkyl.

Abstract: The present invention relates to a method of inhibiting the growth of killing algae, bacteria, yeast and/or fungi in a recirculating water system which comprises adding to the water a polymeric biguanide and an adjuvant of the Formula (1) or a salt thereof: wherein: R1 is an optionally substituted C8 to C12 or C18 to C22 alkyl group; and R2 and R3 each independently is H or optionally substituted C1-4-alkyl.

Abstract: The present invention relates to a method of inhibiting the growth of killing algae, bacteria, yeast and/or fungi in a recirculating water system which comprises adding to the water a polymeric biguanide and an adjuvant of the Formula (1) or a salt thereof; wherein: R1 is an optionally substituted C8 to C12 or C18 to C22 alkyl group; and R2 and R3 each independently is H or optionally substituted C1-4-alkyl.