TDS = Total Disolved Solids.Chlorine and Bleach are not solids, hence aren't picked up by the meter.
QuoteTDS = Total Disolved Solids.Chlorine and Bleach are not solids, hence aren't picked up by the meter. If you leave chlorine on a surface to evaporate you will be left with a white powder that is the solids that are disolved to make bleach.