Patent ID: 7875191
Filing Date: 2011-01-25
Classification: A01N,C02F

Abstract:
1. A method of treating a body of water to kill microorganisms by maintaining an effective concentration of at least two different biocides comprising: adding metal ions comprising adding a silver ion donor to the body of water to maintain a metal ion concentration effective to kill microorganisms; adding sufficient bromine to the body of water to maintain a bromine concentration effective to kill microorganisms; and adding an agent that maintains the effectiveness of the metal ions in killing microorganisms and the effectiveness of the bromine in killing microorganisms, said agent consisting of 1-bromo-3-chloro-5,5dimethylhydantion, 1,3 dichloro-5,5 dimethylhydantion, or 1,3 dibromo-5,5 dimethylhydantion.