Why would nitrate remain near 0 ? - Page 3 - The Planted Tank Forum
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post #31 of 35 (permalink) Old 01-06-2020, 11:04 PM Thread Starter
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I picked up the salifert kit. While I think it is more accurate in the 0-5 range; i think it is less accurate in the 10 to 20 range. Also i made the terrible mistake of looking through the side and thinking my tank was nearly 50ppm; then reread the direction and looked down and saw it was around 3-4.

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I use the Salifert kit and find it to be more accurate based on my dosing than the API one.
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post #32 of 35 (permalink) Old 01-06-2020, 11:20 PM
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I picked up the salifert kit. While I think it is more accurate in the 0-5 range; i think it is less accurate in the 10 to 20 range. Also i made the terrible mistake of looking through the side and thinking my tank was nearly 50ppm; then reread the direction and looked down and saw it was around 3-4.
What makes you think that?
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post #33 of 35 (permalink) Old 01-07-2020, 02:38 AM
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^^^Agreed. No way the Salifert kit is less accurate than the API through 40ppm. In fact, it's not so much an accuracy issue as it is just trying to distinguish colors in the API kit.
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post #34 of 35 (permalink) Old 01-10-2020, 08:02 AM Thread Starter
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It is the colour ranges in the chart for the two tests (colour comparison); api covers the mid range a little better while Salifert covers the lower range a bit better. In the end you still have to compare the colour of the test solution to the chart which in itself is some what a guessing game - this isn't about how accurate the solution is but the ability to match the test solution to the chart. If the test solution itself is not accurate then all bets are off and i have no method to determine if one is more accurate than the other in that regards. While most (all?) my tanks are below 20 they are mostly above 10 'cept the tank discussed in this thread.

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What makes you think that?
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post #35 of 35 (permalink) Old 02-13-2020, 07:05 PM Thread Starter
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For the record chemiclean removed the cyanobacteria. It was extremely effective. The nitrate has been remaining below 5 but at least it is not 0.
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