API phosphate test - Equipment - Aquatic Plant Central

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Old 02-23-2013, 12:50 AM   #1 (permalink)
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Default API phosphate test


I need some advice on the api phosphate test kit. Is the reading/colour suppose to stay the same after the initial 5min and after an hour? The reason why I am asking is because the reading taken at 5min after adding the 2nd solution is total different from the reading taken after an hour. It changes from 0 to 1.

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Old 02-27-2013, 10:20 PM   #2 (permalink)
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Default Re: API phosphate test

Go with the reading taken at 5 minutes, since that's the reccomended time. The reading taken at an hour isn't accurate.
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