Nitrate levels in a Planted Tank - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 04-11-2016, 12:12 PM Thread Starter
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Nitrate levels in a Planted Tank

I'm having a hard time understanding nitrate levels in a planted tank. Currently, I'm dosing E.I. fertilizer and my nitrates levels appear to be in the 20 ppm range (sometimes I second guess the color matching test kits and not sure what I have). I have also noticed that EI ferts. contain nitrates. I have also noticed after reading some of the post that a lot of people use Seachem Purigen in there filters. Wouldn't this remove all of the nitrates from your tank? Doesn't this defeat the purpose of adding fertilizers?

Scott
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post #2 of 3 (permalink) Old 04-11-2016, 12:54 PM
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Purigen removes/detoxifies organic matter that's end product is.. Nitrates.
Purigen has little to no affect on inorganic mineral salt's used as fertilizer in EI dosing scheme.(KNO3,KH2PO4,K2SO4)
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post #3 of 3 (permalink) Old 04-11-2016, 01:12 PM
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Once my nitrates reach 20 ppm I stop dosing products that include nitrates. Your level is about right. You don't want 0 nitrates in a plant tank. Fish only, yes the lower the nitrates the better.
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