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Old 08-19-2011, 02:13 PM   #11
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I'm using a hydrometer for salinity
That can definitely be the problem. If your salinity is higher than the hydrometer reads, both ca and alk will be elevated. Can you check it with a refractometer?
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Old 08-19-2011, 03:02 PM   #12
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That can definitely be the problem. If your salinity is higher than the hydrometer reads, both ca and alk will be elevated. Can you check it with a refractometer?
I had the salinity checked by the LFS and they got same as me on their hydrometer. I don't think its higher than 1.023
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Old 08-19-2011, 09:35 PM   #13
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the API calcium test kit is way off. try another brand, like salifert or elos.
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