Aquarium Fertilizer Calculator app for iPhone and iPad

Here you can quickly see how the recipe affects the dosage of fertilizers and compare with the recommended values. The calculator is also very useful in that it allows you to determine the dosage of Ca and Mg.
In the box at the top "Aquarium Volume" enter the volume of the aquarium in liters.
In the field "How do you fertilize?" select "Prepare mortar" or "Powders straight into the aquarium."
Choose the amount of each substance and in what form you add,
enter all the components of your fertilizer.
The calculator in the lower field will show how much mg / l (ppm) will be added to the aquarium per week. Compare with recommended values.