What method can be used to decrease Total Dissolved Solids in pool water?

Draining the pool is an effective method to decrease Total Dissolved Solids (TDS) in pool water because it physically removes the water that contains accumulated dissolved substances. TDS can increase over time due to factors such as the addition of chemicals, debris, and organic matter, which contribute to an undesirable buildup. By draining a portion or all of the pool water and replacing it with fresh water, you can significantly lower TDS levels, returning the pool water to a more balanced state.

While adding chemicals tends to increase or stabilize levels of certain dissolved solids, and increasing circulation or filtering water can help distribute or remove particles, those methods do not address the root issue of high TDS. Instead, draining and refilling is a more definitive and immediate solution to manage and reduce TDS levels effectively in a pool.