A TDS Meter indicates the amount of Total Dissolved Solids (TDS) in a solution. The unit used by the TDS meters is parts per million (PPM). For example, a TDS reading of 1 ppm would indicate there is 1 milligram of dissolved inorganic solids in each 1 liter of water.
For our experienced gardener we offer this TDS Meter. This meter can be used to dial in your application rates to a precise measurement. Please see our recommended dilution chart at the bottom of this section.