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SWIMMING POOL TEST KIT FOR pH & CHLORINE<br />
Using Phenol Red & OTO or Orthotolidine<br />
Phenol Red added to a water sample indicates pH of between 7.2 & 7.6 (in a range of 6.8 to 8.2).  OTO added to the sample  indicates Chlorine level of 0.4 ppm

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SWIMMING POOL TEST KIT FOR pH & CHLORINE
Using Phenol Red & OTO or Orthotolidine
Phenol Red added to a water sample indicates pH of between 7.2 & 7.6 (in a range of 6.8 to 8.2). OTO added to the sample indicates Chlorine level of 0.4 ppm

Copyright:© 2000 Larry Stepanowicz - Fundamental Photographs

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Larry Stepanowicz