| Water quality varies with location so the best people to ask are your water suppliers. Some water supplies are OK for even the most salt sensitive orchids while others are completely unusable. Water suppliers should analyse their water regularly so check with them to see if you can get hold of a water quality report. Check the concentrations of individual salts as well as the TDS. As the TDS of the water can change over the course of a year it probably worth seeing if you can get reports for each season. Once you know the TDS and take note of any salts that seem high people can give you a better idea of whether and/or how you should use your tapwater. As Jerry said letting water stand will get get rid of chlorine from the water. However, many suppliers treat the water supply with chloramine instead of chlorine which can not be removed by letting the water stand. Check with your supplier regarding what is added. |