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Old 04-24-2013, 10:04 PM   #1
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Calcium test kits

Ok, I've got a Small fortune wrapped into the 3 calcium test kits I own, and even by following the directions exactly with the same water sample my results are so far apart. My Salifert test reads 440, my Hanna Checker reads 488, and my API reads 400. I was told the "sweet spot" for optimal coralline growth should be as close to 440 as possible, but which one should I believe?
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Old 04-24-2013, 11:03 PM   #2
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I def wouldn't believe the API one. I believe the hanna checkers are money, I'd believe that.
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Old 04-25-2013, 08:31 PM   #3
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Tell you the truth I can do 2 Hanna tests in a row an get way different results
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Old 04-25-2013, 08:33 PM   #4
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Originally Posted by MyR6Rocks View Post
Tell you the truth I can do 2 Hanna tests in a row an get way different results
....send your water to a lab? And give your tests back. That's like totally brutal.
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Old 04-25-2013, 08:34 PM   #5
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....send your water to a lab? And give your tests back. That's like totally brutal.
Or send to a lab and then see which is the closest and send others back.
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Old 04-25-2013, 09:33 PM   #6
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I would believe the Salifert. I have not used the Hanna Calcium Checker because from what I have read they are very hard to get the measurements correct and can be a lot of difference between tests. I have used Salifert and have compared it to Red Sea Pro.
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