The CC Supreme exists for two reasons: pools longer than 40 feet, and a waterline the CC Plus cannot properly clean. If neither applies to you, buy the CC Plus and save about $550.
50 feet with no runtime limit
On a large pool the question is not how well a machine cleans but whether it finishes. A machine that covers 70% and stops leaves the same 30% dirty every single cycle, and that is a runtime problem no amount of suction fixes.
A corded machine has no runtime limit at all — it cleans until its cycle logic says it is done. Among cordless machines on this site, only the Aiper Scuba S1 Pro (2,150 sq ft, on a renewed listing) and the Obsidian (180 minutes) realistically cover a large pool in one go. The large-pool roundup is explicit that corded wins here.
A dedicated waterline scrubber, not a wall climb
This is the feature difference from the CC Plus and it is a real one. Most machines reach the waterline by climbing the wall — dragging a brush vertically through the grease film once, which tends to smear it. Maytronics gives the CC Supreme a brush whose job is the waterline specifically.
The film is body oil, sunscreen and airborne pollen, continuously replenished, and it needs repetition rather than pressure. The climbing-versus-waterline distinction matters, and the waterline roundup compares the machines that genuinely do it.
Dual drive
Two drive motors rather than one, which matters on a long pool: more consistent traction across a 50-foot run and better behavior on the shallow-to-deep slope. It also means drive effort is less likely to rob the suction that holds the machine to the wall during a climb.
The Maytronics ownership case still applies
No battery. Ultra-fine filter cartridges at about $26 for four — the cheapest fine filtration in the category. Brushes at $23-30, tracks at $35, a motor assembly available at about $110, a power supply at $130-210. All numbered, all stocked nationwide.
A ten-year ownership horizon on a machine where the expensive failures are purchasable parts is a genuinely different proposition from a four-year horizon on a sealed cordless flagship — which is the whole cordless-versus-corded argument.
The honest downsides at this price
It costs more than most cordless flagships and skims nothing. At about $1,449 you are in Sora 70 and TigerShark QC territory, and the Sora 70 skims the water’s surface.
A long pool means a long cable, and cable twist compounds with length. Uncoil the whole cable into the water before the cycle rather than feeding it in, and site the power supply at the midpoint of the long side. A caddy stops being optional.
No published suction or micron figure, as with every Maytronics machine.
How we assessed it, and what we did not do
Every figure in the specification table on this page is attributed: to Dolphin’s published specifications, to the Amazon listing for this exact model, or marked as not published where neither source gives a figure. The score is derived from those published numbers by the five-metric rubric, which is published in full.
We have not physically tested this machine. We do not run a test pool, we do not own this unit, and nothing on this site claims otherwise. What we do instead is show where every number comes from, say plainly who the machine is wrong for, and refuse to print a figure we cannot source. Where owner reports inform a point, they are described as owner reports — never as our own experience.
Who should skip it
Skip the Dolphin Nautilus CC Supreme if your pool is under 40 ft — the Nautilus CC Plus does the same job for roughly $550 less.
That is not a throwaway line. The most expensive mistake in this category is buying a capable machine that is wrong for your pool — and a machine rated below your pool’s area or missing the one capability your debris requires cannot be fixed by any setting.
Alternatives worth considering
- Dolphin Nautilus CC Plus — about $550 less if your pool is under 40 ft and the waterline is not the issue. Read the review
- Polaris VRX iQ+ — 70 ft of cable on a tangle-reducing swivel, for a long freeform pool. Read the review
- Beatbot Sora 70 — the same money and it skims the surface, if your pool is under trees. Read the review
If you are still narrowing down, the selector tool works from your pool type, size, surface and dominant debris, and the Dolphin brand guide covers the whole range and where it stops.
