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Podcast: Rule Your Pool
Episode: PPM and PPB
Description: 00:00 - Intro01:59 - PPM = parts per million. It's the density of a given substance dissolved in water. It's the ratio of that substance compared to water. 1 PPM means the dissolved substance is one-millionth of the volume of water.03:47 - PPM = mg/L. Converting from the metric system it makes sense. Â 1 cubic meter of water contains 1000 Liters. Each liter contains 1000 mL. Then we switch to solids, because we're talking about dissolved substances. 1 mL = 1000 mg.07:00 - Brief overview of chemistry targets that use PPMÂ 10:16 - Phosphates are measured in PPB, not PPM. Parts pe...