If finances are an issue, I would suggest the only powerful purifiers are the Miracle-Mineral-Supplement and CDS from Jim Humble. If finances are not an issue, the electrical blood and magnetic pulser lymph purifiers, with the silver colloid back-up system for secondary infestations and infections, like Candida and bacterial overgrowth, are great. These are available at: http://www.sotainstruments.com/
They also sell a water ozonation device which again is parallel to the Jim Humble protocol of Miracle-Mineral-Supplement /CDS.
If I were in a jam, I'd grab some Potable Aqua chlorine dioxide tablets, CAREFULLY add citric acid and CAREFULLY run them through a series of gas traps with silicon tubing/glass components (baby bottles) to whack back the infection. Alternatively, one could try the food-grade hydrogen peroxide, another oxidizer. Lysine is an anti-viral so I'd complement my therapy with that. It's cheap.