A pool vacuum robot scrubs the floor of an in-ground pool, and usually the walls, running off its own power supply while the filter pump stays off.
Two spec rows decide whether it earns its price: whether the coverage line includes the waterline, and how the cable behaves in the water.
Waterline coverage is its own spec row
Maytronics prints two separate rows on every Dolphin product page, “Cleaning Coverage” and “Waterline Scrubbing”. On the Nautilus CC Plus with Wi-Fi those rows read “Floor and Walls” and “No”. One model up, the Nautilus CC Pro reads “Floor, Walls and Waterline” and “Yes”.
Some review sites list waterline cleaning as a CC Plus feature anyway. The table is what the warranty is written against.
The same page contradicts itself on size: the spec table caps the CC Plus at 40 ft, while one of its own bundle names advertises pools up to 50 ft.
| Dolphin model | US store price | Max pool length | Coverage |
|---|---|---|---|
| Nautilus CC Plus w/Wi-Fi | $749 (from $849) | 40 ft | Floor, walls |
| Nautilus CC Pro | $1,149 | 50 ft | Floor, walls, waterline |
| Nautilus CC Supreme | $1,299 | 50 ft | Floor, walls, waterline |
| Nautilus Titan | $1,449 | 50 ft | Floor, walls, waterline |
As listed on the Maytronics US store, 4 September 2026.
What an anti-tangle swivel actually covers
All four Dolphins above list “Anti Tangling Swivel: Yes”. The user manual is more specific: the swivel section measures 3.5 m, or 12 ft, of the floating cable. Not the whole run.
That manual lists “cable twisting or cable coils up” as a named symptom, with four fixes: clear obstructions, take excess cable out of the water, clean the filter cartridge, and lay the straightened cable in the sun.
The swivel reduces twist without retiring the chore.
Cable length goes wrong in both directions. Too much slack coils up, and too little leaves the robot short of the far end. Unwind only what the pool needs, then lay it straight along the edge.
Going cordless trades tangle for runtime
Aiper’s Scuba X1 Pro Max is cordless and lists surface, floor, wall and waterline cleaning, nine brushless motors, and debris capture down to 3 microns.
Runtime is what you trade for it. Aiper’s page puts floor cleaning at 5 hours in Eco mode against 3.5 hours in Max mode, so running it hard costs about 30 percent of the cycle.
It also has to leave the water to charge, which puts recharge time into your weekly routine.
Skip the flow-rate race. Maytronics lists the CC Plus at 4,500 gph and the pricier CC Pro at 4,000 gph, while Aiper claims 8,500 GPH.
No page names a test method, which leaves cross-brand gph as unreliable as the suction figures quoted for indoor robot vacuums.
The limits printed on the last page
Maytronics opens its troubleshooting section with limits the water must sit inside: pH 7.0 to 7.8, chlorine 4 ppm maximum, salt 5,000 ppm maximum, and water between 6 and 35 degrees Celsius.
Salt-pool owners should check that last figure against their own readings.
The power supply is rated 180 W, output under 30 VDC, IP 54, splash proof rather than submersible. The manual wants the outlet on a ground fault interrupter, and says not to plug in until the robot is in the water.
App control runs over Wi-Fi through MyDolphin Plus, not the smart home protocols carrying the rest of your outdoor kit.
Storage gets its own warning: never in frost. For most Canadian pools the robot comes indoors the same weekend as your seasonal outdoor gear.
Every figure here is for in-ground pools. Above-ground shells change wall angle and cable geometry, so these rows do not carry over.
Pool vacuum robot questions
Does a pool vacuum robot replace brushing the waterline?
Only if the spec sheet lists waterline scrubbing. Models that stop at “Floor and Walls”, the Dolphin Nautilus CC Plus among them, leave that band to you.
Can I run the robot with the pool pump on?
It has its own power supply and does not need the pump running. Maytronics does say nobody should be in the pool while the cleaner works.
How long should the cable be for my pool?
Long enough to reach every corner and no longer. Maytronics says to unwind the minimum your pool needs and keep the rest out of the water, because slack is what coils.
Sarah Chen is a consumer tech journalist at 3Zebras, covering iPhone troubleshooting, iOS features, and Apple ecosystem products. She has been writing about mobile technology since 2018 and has a particular talent for turning complicated technical problems into simple, step-by-step solutions. Sarah tests every fix she writes about on her own devices before publishing. Her guides on iPhone settings, Face ID troubleshooting, and iOS updates have helped thousands of readers solve real problems without visiting the Apple Store.