There are several nutrient calculators available online, but this guide will walk you through the math and conversions if you want to do them yourself (e.g., as part of tracking your total feed amounts or comparing two product lines).Įlemental PPMs are just the concentration (by weight) of each element (N, P, K, etc) in your feed solution. This is not the same as TDS (Total Dissolved Solids) ppm, which is a measure of electrical conductivity converted to an equivalent number of Na (500-scale) or K (700-scale) ions in the solution. This guide will walk you through how-to calculate elemental PPMs in a nutrient mix.Įlemental PPMs are the weight ratio of each element in a nutrient solution to the overall weight of that solution, expressed as parts per million.
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