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What should values be for pH, alkalinity, etc when testing?


Susanj

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I find this interesting -the owner's manual for my spa gives recommended levels for chemicals and it is quite different from the box of test strip recommendations.

 
Even different test kits show different recommended levels. 
 
For instance , bromine  3-5 ppm vs  2-6
 
Chlorine  2-5 vs 2-4
 
pH   7.2-7.8 vs 7.2-7.5 or  7.4-7.6
 
Alkalinity 40-120 vs 80-120 
 
Hardness 50-150 vs 100-400
 
Maybe this just shows it's not all that critical and there is a wide range of acceptable?
 
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