The easiest way to do the dilution is what we jokingly call the "CarlD Patented Shot Glass method"! But it works!
1) Get a gallon of Steam Distilled water--your supermarket or discount drug chain has it.
2) Get a shot glass (a CLEAN one--if you intend to imbibe, do THAT from a different glass, please!)
3) Get something like a Pyrex measuring cup.
4) Add one shot glass of pool water and one shot glass of distilled water.
5) Stir
6) Test THIS in your test block and double the numbers--so if it reads "5" it's really 10ppm.
7) If that's not high enough (and it won't be since you are aiming for 20ppm) you'll add 3 shots of distilled water to your 1 shot of pool water. Then, if your test block reads "5", you'll quadruple it to measure "20"ppm!
Simple!
(Note: The more times you dilute the pool water the less accurate this method becomes. Ultimately, you should get a FAS-DPD Chlorine test kit, like the Taylor K-2006. But, for now, in your emergency situation, dilution is FINE!)
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