"When used as a hard surface disinfectant hydrogen peroxide is normally used at around 3%. When used in recreational water, hydrogen peroxide is used at 27 to 100 PPM (MG/L), which is 1111 and 300 times, respectively, more dilute than that used on hard surfaces. Borgmann- Strahsen evaluated the antimicrobial properties of hydrogen peroxide at 80 and 150 PPM (MG/L) in simulated POOL conditions.71 Whether 150 PPM (MG/L) of hydrogen peroxide was used by itself or in combination with 24 ppb of silver nitrate it had negligible killing power against Pseudomonas aeruginosa, E. coli. Staphylococcus aureus, Legionella pneumophila or Candida albicans, even with a 30 minute contact period. In the same tests the sodium hypochlorite controls displayed typical kill patterns widely reported in literature. Borgmann-Strahsen concluded that hydrogen peroxide, with or without the addition of silver ions, was, “no real alternative to CHLORINE-based DISINFECTION of swimming POOL water from the microbiological point of view.”