Fertilizer Calculator

I added Fertilizer Calculator on the right hand side of this blog. It is based on Chuck's Calculator although many things have been change and added. For example now you can calculate the ppm for Ca(NO3)2.4H2O and Seachem product (N, P, K and Fe).

You might notice that Chuck's Calculator result is slightly different than APC Fertilator. In my opinion APC Fertilator is more accurate than Chuck's Calculator. I based this calculator on my own calculation and the calculation result is closer to the APC Fertilator except for the Ca(NO3)2.4H2O. The Ca calculation is correct but NO3 calculation is not. I'm curently asking APC (Aquatic Plant Central) on how did they calculate the NO3 ppm for Ca(NO3)2.4H2O.

It is pretty simple to use:

1. Select which chemical you want to add from drop down menu


2. Fill in either gram, teaspoon, tablespoon or milliliter. Gram, teaspoon and tablespoon are for dry fertilizer. Milliliter is for Seachem product.


3. Fill in how much water you want to dilute your dry fertilizer with. Enter 0 if you want to dose directly into the tank. You also need to enter 0 if you are dosing Seachem product. Default value is 1000 ml.


4. Enter your tank size. Default is 50 gallons (US) or 189.27 liters


5. Move cursor away and click anything outside the calculator area, It will calculate ppm for every 1ml of solution dose into the tank. For dry fertilizer and seachem products, it will calculate how many ppm in the tank.

APC have reply my question and yes NO3 calculation for Ca(NO3)2.4H2O not correct