The Silver Institute , Washington, D.C., issued a report showing that a 20,000 gallon pool in Lincoln, Nebraska, infused with 50 gallons of sewer effluent was purified to a zero level with only 3.2 ppb of silver in the water as the disinfectant. Legionella is very resistant to even higher levels of chlorine. Eighty minutes was required for a virtually complete kill of pseudomonas aeruginosa bacteria using chlorine versus only twenty minutes using silver. The Conventional Chlorine System Chlorine is a good disinfectant under certain conditions, but when the pH becomes a little high, a common problem with most pools, chlorine becomes almost totally ineffective. Another problem with chlorine is the difficulty of maintaining a residual in the generally accepted range of 1.0 to 3.0 ppm.
Chlorine is dissipated rapidly by sunlight.
It is also absorbed through the skin. The effective chlorine in a pool can be almost totally depleted in a few hours. This can happen even when a automatic chlorinating system is used. This indicates that a large percentage of pools do not always maintain a sufficient level of chlorine and even in those that do, a large percentage are still not safe for swimming. If the conventional chlorine method was working, swimmers would not have significantly more infections than non swimmers.