Honestly, a little TDS is no big deal. But let it get too high, and your pool chemicals become about as effective as a chocolate teapot. You’ll dump in more chlorine, more shock, more everything—and the water still looks blah.
High TDS can also damage your pool equipment. Scale builds up in your filter, heater, and pump, making them work harder. That’s like asking your car to drive with a parking brake on—expensive and annoying.
And here’s a funny truth: your tap water might have 300 ppm TDS, while your pool water can creep up to 2,000 ppm after a few years. So really, you’re swimming in a soup of history—every splash, every cannonball, every drop of rain has left a trace.
TDS: Total Dissolved Solids in your Swimming Pool, Salt Water Pool and
The Secret Fix: Water Dilution
The only real way to lower TDS is to drain and refill some of the water. I know, I know—it sounds like a chore. But think of it as giving your pool a spa day. Remove 25% to 50% of the old water and replace it with fresh, low-TDS tap water.
If you get a big rainstorm, that actually helps! Rainwater is nearly TDS-free, so it dilutes the pool for free. Mother Nature is your pool buddy, even if she also brings thunder and your inflatable flamingo floating away.
Another option is reverse osmosis filtration—a fancy truck that parks by your pool and filters the water without draining it. It’s like a detox diet for your pool, but it can cost you a few hundred bucks. Worth it if you don’t want to wrestle with a hose.
