How To Use:
1. Select your "Injector Ratio" from the "Ratio" drop down menu to the left, and your Parts Per Million (PPM) from the drop down labeled "PPM" which will then reflect your setup on the "ppm Nitrogen" bar.

2. Locate the "Percent Nitrogen" of your fertilizer.

Correct values will be displayed as "Oz. of Peters® Excel® per Gallon of Concentrate" and "Approx. Gallons of Water Needed to Dissolve one 25 lb. bag."

For smaller measures, please reference the Volumetric Measuring chart located here.