Abstract: Therapeutic and prophylactic treatments of aquatic species and aquatic diseases through the controlled introduction of a heterocyclic N-halamine into an aquatic habitat.

Abstract: End-of-life apparatus for use in water purification cartridges are disclosed. The apparatus includes a water-disintegrable tablet configured to disintegrate a predetermined amount after contacting a predetermined volume of water flow. The tablet prevents the stoppage of water until the tablet has been contacted by the predetermined amount of water. The various end-of-life apparatus use different means to stop the water flow when the tablet has disintegrated a predetermined amount.

Abstract: Therapeutic and prophylactic treatments of aquatic species and aquatic diseases through the controlled introduction of a heterocyclic N-halamine into an aquatic habitat.

Abstract: A tablet includes benzoic acid and trichloroisocyanuric acid. The tablet provides free available chlorine in water to maintain an N-halamine-containing polymer biocidal, without rendering the water undrinkable from high chlorine content. The tablet may be used in a water purification device having a cartridge containing an N-halamine polymer to provide safe drinking water.

Abstract: The water purification cartridge treats water with a halogen liberated from halogenated hydantoinyl resins and polymers, resulting in the safe, complete, and economical purification of non-potable water at low flow rates typically found in gravity feed filtration systems and at water pressures of less than 1 psig. The cartridge of the invention purifies non-potable water of bacteria, viruses, and some protozons without the need for additional power sources or risk to the consumer for exposure to chemicals that have been identified to have harmful, long-term effects. The cartridge described herein enables a gravity fed water purification system by combining the cartridge with conventional filters, such as porous diatomaceous earthen ceramic water filters or activated carbon filters packed either with granular activated carbon or block.

Abstract: A water purifier that can be placed between an upper canister and a lower canister. The upper canister may include filters. Unfiltered water placed in the upper canister drains by gravity through the filters and water purifier into the lower canister. The water purifier includes a dispenser, a purifying media, and an indicator. Filtered, but unpurified, water passes from the upper canister into the water purifier, which houses the dispenser in which a material containing a chlorine and/or bromine compound is located. As water contacts the material, halogen is eluted to the filtered water. The purifying media contacts the unpurified water with halogen. The purifying media binds with the halogen, thereby maintaining the activity of the purifying media to purify the unpurified water. The water purifier may include an indicator to indicate when the material needs replacing.

Abstract: A composition and the method for sustaining the biocidal activity of chlorinated polystyrene hydantoin beads. The method comprises supplying a continuous low level halogen concentration to the chlorinated polystyrene hydantoin beads in the water to be treated that flows in contact with the chlorinated polystyrene hydantoin beads, resulting in treated water suitable for drinking.