How to calculate PPM:
PPM is an abbreviation for "Parts per Million", a often misunderstood and misused term of some ill repute. To clarify, I mean one part of a substance to a million parts of solution, a 1 to 1,000,000 ratio.
Nutrient solutions are mostly water, with a little bit of fertilizer added.
Water is considered to be the solvent
since it is what the nutrient solutes
are dissolved into to form the nutrient solution
. The nutrient solution is considered to be aqueous
because the primary component is water. How much is added determines the concentration
PPM is a measure of concentration, and is used to determine how much of a nutrient should be added to reach a given nutrient level.
To keep things simple, I'll walk you through the calculations using a liter of water for the solvent. The end result can be multiplied by 3.78541 to calculate for a gallon. Each 5 ml increment is marked for the nutrient solutes, which is an even swap for a teaspoon (3 teaspoons to the tablespoon). Note it will allow for non water soluble nutrient mixtures.
So let's get started:
Gentle Reader, there is a theoretical liter of crystal clear water in cyberspace awaiting you. What would you like to add?