What Is the Normal Range for NPK, gH & kH - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 04-04-2010, 04:42 PM Thread Starter
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What Is the Normal Range for NPK, gH & kH

What Is the Normal Range for NPK, gH & kH in a fresh water planted aquarium - 3 watts per gallon, heavily planted with stem plants like hygros, pressurized CO2 and organic substrate?


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post #2 of 3 (permalink) Old 04-04-2010, 04:50 PM
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HOLY COW BATMAN!!! What a group of questions!

GH & KH would vary based on source water. (IMO)

P from 0.5-1ppm as the average listed range in a lot of posted parameters. Then T. Barr maintains way higher levels to reduce GDA.
N as anything 10 - 40ppm.
K I don't have a test kit for.


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post #3 of 3 (permalink) Old 04-05-2010, 01:17 AM
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GH and KH at least 3 German degrees of hardness. Great for soft water fish.
As high as 10 degrees, or even more for hard water fish.

Plants are not very particular, but they do need the Ca and Mg which is measured by GH, and KH over 3 degrees leads to a more stable pH.
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