Water purification material and method for use in sanitizing pools and spas where the water purification material is free of antimicrobial materials

A method for maintaining a body of recreation water in a sanitized condition where the body of water is free from a source of metal ions and free from bromide or bromine compounds that can sanitize the body of water comprising:

• maintaining a concentration of free available chlorine in the body of recreation water that is insufficient to sanitize the body of recreational water for human partial immersion in the body of recreation water;
• adding a compound having a hydantoin ring therein into the body of recreation water;
• and adding a non-chlorine based oxidizing agent into the body of recreation water that when used alone in the body of recreational water is insufficient to sanitize the body of recreational water, the oxidizing agent interacting with the chlorine in the body of recreational water to increase the antimicrobial of the chlorine while also interacting with the compound having the hydantoin ring.

A dispenser for killing microorganisms in a body of recreation water free from a source of metal ions and free from bromide or bromine compounds and having a concentration of free available chlorine in the body of recreational water that is insufficient to sanitize the body of recreational water for human partial immersion in the body of recreation water comprising:

• a first housing having a compound having a hydantoin ring placeable into the body of recreation water;
• and
• a second housing having a water accessible compartment containing a non-chlorine based oxidizing agent that when used alone in the body of recreational water is insufficient to sanitize the body of recreational water, the oxidizing agent interacting with the chlorine in the body of recreational water to increase the antimicrobial of the chlorine while also interacting with the compound having the hydantoin ring to convert the compound having a hydantoin ring to an antimicrobial active N-Halamine to sanitize the body of water safe for human partial immersion in the body of recreation water without the presence of a source of metal ions to supplement the chlorine.