Aiper Scuba S3 Robotic Pool Cleaner

The Scuba S3's distinguishing feature is how it handles the waterline. Most robots climb the wall, brush the tile briefly at the top of the arc, then slide back down — so the waterline gets seconds of contact per pass. The S3 turns and travels <em>along</em> it at a steady 5 ft per minute.

Sideways waterline scrubbing

This is the detail worth paying for if the grey band at your tile line is the thing that bothers you. Sustained lateral contact at a controlled speed is what actually removes the oil-and-sunscreen film; a vertical pass across it doesn't dwell long enough to do much.

Path planning

Sensors build a structured route around the pool's real shape rather than bouncing off walls at random. Less wandering means less battery spent recovering ground it already covered — which is how an 18 lb battery robot manages full coverage in the first place.

Filtration and handling

The same dual-filter approach as the rest of the current Aiper range: 180-micron mesh for leaves, a replaceable 3-micron layer for dust and sand. At 18 lb it's light enough to lift one-handed, and it parks itself at the waterline for ten minutes with a phone notification when it's done.

Another model worth a look

Compare our 17.9-lb cordless Dolphin Liberty 200 (magnetic inductive charging + 2-yr Maytronics warranty) or corded Dolphin S200 ($999).