Robotic pool cleaners are the better bet.

Yes, they cost more upfront, but they save you time, energy, and chemicals. Pressure-side cleaners are the old way, and unless you’re on a tight budget, there’s no good reason to stick with them.

Pressure-side cleaners connect to your pool’s return line and use water pressure to move around. They work fine for basic debris, but they rely on your main pump running, which adds wear and electricity cost. They also need a separate booster pump for decent performance, which is another expense. Robotic cleaners are self-contained. Plug them in, drop them in the water, and they scrub, filter, and climb walls on their own. The motor is inside the unit, so your main pump stays off. Their filtration is finer — down to 2 microns sometimes — meaning fewer chemicals needed for clarity.

The downside? Price. A decent robotic cleaner runs $600–1,200, while a pressure-side unit can be had for $200–400. But that gap closes when you factor in the booster pump and extra electricity for pressure-side. Robotic cleaners also last longer if you maintain them, and they’re easier to troubleshoot since nothing is tied to your plumbing.

If you’ve got a big pool with lots of leaves or fine debris, go robotic. If you’re renting or have a small pool you just want to knock the big stuff off, pressure-side is fine. But for most homeowners, the robot pays for itself in less headaches.