3 Things to Know About Lowering High TDS in a Pool

Draining and refilling is the only real solution If your TDS is above 2500–3000 ppm and causing problems, the only practical fix is to drain a portion of the pool and refill with fresh water. No chemical or filter will reduce dissolved solids.

High TDS is rarely worth worrying about Unless you see cloudy water, scaling, or chlorine losing effectiveness, ignore TDS. Most residential pools never need action, and worrying about it is a waste of time.

Avoid expensive alternatives like reverse osmosis Truck-based reverse osmosis services exist but cost a fortune and aren’t worth it for a home pool. Stick to draining a third to half the pool if you must, then focus on your pH instead.