DE filters clean better, but sand filters are easier.

Go with sand unless you really care about crystal-clear water and don’t mind extra maintenance.

DE (diatomaceous earth) filters catch smaller particles—down to 2-5 microns versus sand’s 20-40. That means noticeably clearer water, especially if you’re picky or have a lot of fine debris. But they’re a pain to maintain. You have to backwash regularly and add fresh DE powder each time. The filter grids can tear, and disposal of DE is a hassle (it’s not great for the environment).

Sand filters are dead simple. Backwash every few weeks, replace the sand every 5-7 years, and done. They’re cheaper upfront and easier to fix. The trade-off is slightly cloudier water—still perfectly swimmable, just not as polished. Most homeowners won’t notice the difference.

If you’re the type who obsesses over pool clarity and doesn’t mind a little extra work, get a DE filter. If you want to spend more time swimming than scrubbing, get sand.

You can always buy a DE filter later if the sand filter bugs you. But I doubt it will.