Zodiac Pool Care, Inc.

Fountainhead Technologies, Inc.

Joseph W Grenier

Raymond P Denkewicz, Jr

Ernest E Senderov

John D Rafter

Therese R Souza

Mark A Bollinger

The present invention relates to compositions and methods for treating water to reduce the phosphate level thereof and control the growth therein of algae and other microorganisms by treating the water with an effective amount of a composition containing a lanthanide halide.

Lanthanide halide water treatment compositions and methods

The present invention relates to water purification compositions comprising silver and a second material, such as aluminum or zinc metal, to methods of treating or purifying water using this composition.

Silver self-regulating water purification compositions and methods

The present invention is directed to a biocidal water treatment composition, water treatment apparatus, and method of treating water to reduce levels of pathogens. The composition contains sources of copper, zinc, and silver metal ions within a crosslinked polymer matrix. Examples of these ion sources include copper sulfate, zinc sulfate, and silver nitrate. An example of the crosslinked polymer matrix is crosslinked chitosan, which also serves to clarify the water and release the metal ions over time. The product is easy to manufacture, and allows the use of decreased halogen sanitizer, as well as decreased copper ion, thereby decreasing the likelihood of staining. The product simultaneously provides good bactericidal and algaecidal properties, despite low levels of copper ion and low chlorine levels.

Biocidal compositions for treating water

A method of purifying water includes contacting water containing an oxide of chlorine, such as chlorine dioxide, chlorite, or chlorate, with a water purification composition that includes a Group 11 or Group 12 metal such as silver, copper, or zinc.

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North Providence, RI, United States of America

Joseph W Grenier