Allkalinity Pro Test Kit

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Aquarium Advice FINatic
Dec 27, 2008
Hammonton, NJ
I bought the Red Sea Alkalinity Pro Test Kit . The problem that I'm having is that I can't get a correct reading. When I add the first drop of alkalinity titrant it turns blue ,I proceed to add a drop at a time so it turns purple but instead it turns yellow it never gets to the end point Which is Purple.

If anyone else uses this test kit can you help me ?
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