Re: [APD] Is Chuck's Calulator accurate?

[Chuck Gadd <cgadd at cfxc_com>]

Byron J. Yu wrote:

> Anyways, i wanted to see how much nitrate i actually end up putting in
> there so i used chuck's fertilizer calulator: So everytime i dose, i
> dose (1.25ml/2 = .125 tablespoons) in a 20 gallon tank, and i just put
> 1ml as the size of the solution to mix in so i get the exact amount on
> nitrates i end up putting in, in the nitrates/ml result window.
> Accourding to the calculator i end up putting 17 ppm of nitrate twice
> a week! Is that right? I usually test the nitrate in my water 1 hour
> after i dose it but still end up getting 5-10 ppm of nitrate in my
> tests.
>  
What form of KNO3 are you dosing?  KNO3 is a dry powder.  If yours in 
solution, than it's not pure KNO3......

How did you translate 1.25ml twice a week into .125 tablespoons?

But if you do add .125 tablespoons of KNO3 into a 20g tank, you are 
adding 17 ppm Nitrate.


> So either the calculators wrong, my test kit is wrong (i have
> overdosed b4 and have read higher nitrate readings so i know i'm
> reading it right), i'm testing the water too soon after dosing, or my
> plants are absorbing nitrate at an astounding amount.
>  
Or you aren't adding as much KNO3 as you think.


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