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Discussion Starter · #1 ·
i have the hagen master test kit. it has 2 ph tester bottles one for ph up to 7.4 ish the other over 7.4, only difference is for the higher ph test you use 3 drops instead of 2. does anyone know if the contents r identical as i have used up the high ph and still have plenty of the lower tester?

thank you, come again
Kathie
 

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if you have any PH high left, you could run two tests side by side and compare.
 

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The test kits for high and low contain different chemicals.
 
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