Dosing Help

[BigWave]

So I just helped @Niz on seeing how much he's dosing and thought of making a easy post so we can use the info for all fertz.

In our example we are using Aquarium CO-OP EasyGreen.
Their instructions state: For the 500 ml (16.9 oz) bottle, dose 1 pump (1 ml) per 10 gallons of water per week.

Guaranteed Analysis:
— Water Soluble Nitrogen (N) 2.66%
— Available Phosphate (P2O5) 0.46%
— Soluble Potash (K2O) 9.21%
— Water Soluble Magnesium (Mg) 0.7%
— Boron (B) 0.015%
— Water Soluble Iron (Fe) 0.13%
— Water Soluble Manganese (Mn) 0.036%
— Molybdenum (Mo) 0.00098%
— Water Soluble Zinc (Zn) 0.0072%
NPK 2.66 - 0.46 - 9.21

In their forums they state how much each dose is. Lets forget about this part for a minute....
The amount of measurable nutrients and minerals in each pump of Easy Green fertilizer are as follows:

Nutrients and Minerals	Parts Per Million (ppm)
Nitrogen (NO3)	3 ppm
Phosphate (PO4)	0.162 ppm
Potassium (K)	2.01 ppm
Magnesium (Mg)	0.18 ppm
Boron (B)	0.004 ppm
Iron (Fe)	0.034 ppm
Manganese (Mn)	0.01 ppm
Molybdenum (Mo)	0.0002 ppm
Zinc (Zn)	0.002 ppm

What nutrient amounts are in each pump of Easy Green fertilizer?

The amount of measurable nutrients and minerals in each pump of Easy Green fertilizer are as follows: Nitrogen (NO3) = 3 ppm, Phosphate (PO4) = 0.162 ppm,

www.aquariumcoop.com

Here is the thread describing how to break down and calculate the equation to get ppm dosed into tank.

Easy Green Ingredients Added in ppm

Today, I had to titrate my tap water with RO water to get to recommended harnesses... and then I went down the rabbit hole. Now I'm confused. I'm looking at my easy green and am confused how mathematically I convert the bottle contents into an ending ppm when added to a barren aquarium. Assume I ...

forum.aquariumcoop.com

2.66% of Nitrogen = 2.66 * (1,000,000 /100) = 26,600ppm of Nitrogen.

Then putting 1mL into 10 gallons (37,855 mL): Multiply gallons by 3785 to get mL.
26,600 ppm of Nitrogen * (1 mL/ 37,855 mL) = .7 ppm of Nitrogen.

Convert ppm of Nitrogen to ppm of Nitrate (Multiply by 4.43 aka the ratio of the atomic weights of Nitrate and Nitrogen):
Atomic Mass Nitrogen N = 14.0067 g/mol
Atomic Mass Oxygen O = 15.9994 g/mol
Atomic Mass Nitrate NO3 = 62.0049 g/mol
Gotten from Wikipedia
Now: 62.0049 g/mol Nitrate divided by 14.0067 g/mol Nitrogen = 4.426802887, rounded to 4.43

.7 ppm of Nitrogen * 4.43 = 3.11 ppm of Nitrate.

Do note for some commercial fertilizers they state N as Urea or ammonial nitrogen which would be Urea NH2-N or Ammonium Nitrate NH4-N.
Some even change up PO4 as H2PO4 or even Potassium as K2O.
Each of these have to be converted in to the final form eg N, P, K to acheive the results.

 

[klibs]

I'm a big fan of using spreadsheets to track how much I am dosing in my tank.

Makes it really easy to keep track of things once you do the calculations like you have here.

Rotalabutterfly calculator is also a great resource for dosing calculations as a starting point

 

[Immortal1]

Great bit of leg work @BigWave

 

[BigWave]

I'm a big fan of using spreadsheets to track how much I am dosing in my tank.

Makes it really easy to keep track of things once you do the calculations like you have here.

Rotalabutterfly calculator is also a great resource for dosing calculations as a starting point

Totally agree. I have made all sorts of calculators over the years. It keeps my mind at peace haha. I tend to track how much im dosing per tank until it gets going good and forget about it lol.
Rotala butterfly is a great resoruce but it needs severily updated to all the new fertz out and about now days. Requests it looks like go on deaf ears.....

 

[Hanuman]

The IFC Aquarium Fertilizer Calculator can do all those calculations. We also keep it updated and Easy Green is among one of the many fertilizers we have in the database. Best used on a computer as it is packed with information. It's Microsoft Excel based.

 

[desh]

The IFC Aquarium Fertilizer Calculator can do all those calculations. We also keep it updated and Easy Green is among one of the many fertilizers we have in the database. Best used on a computer as it is packed with information. It's Microsoft Excel based.

Thanks @Hanuman and team. I've been using your calc for a few months and once figured out is the easiest way to make ferts.