Patent ID: 7938277

Claim:
A method for treating a liquid composition susceptible to unwanted microbial growth, the method comprising: placing a container in contact with a liquid composition susceptible to unwanted microbial growth, the container comprising a casing, not part of an internal combustion engine filter housing, impermeable to the liquid composition susceptible to unwanted microbial growth, and defining a hollow interior at least one opening and a further opening other than the at least one opening into the hollow interior; a microbiocide component located in the hollow interior of the casing, the microbiocide component being resistant to wetting in a liquid composition susceptible to unwanted microbial growth in contact with the container such that direct introduction of water into the hollow interior is effective to facilitate an initial release of the microbiocide component into a liquid composition susceptible to unwanted microbial growth external from the casing; at least one liquid permeable element provided at or near the at least one opening of the casing and effective to provide for release of a portion of the microbiocide component into the liquid composition susceptible to unwanted microbial growth external from the casing; and a plug in the further opening to prevent a liquid from entering the hollow interior through the further opening, the plug being removable from the further opening to allow liquid water to be directly introduced into the hollow interior through the further opening.