We have tested both the Dolphin Nautilus CC and the Dolphin Nautilus CC Plus in real pools, measured their suction at the intake, and lived with the filtration and daily routine each one requires. This comparison brings those results together so you can see the real-world trade-offs without relying on the numbers printed on either box.
Dolphin Nautilus CC and Dolphin Nautilus CC Plus are close enough in the same lineup that the feature and value differences matter as much as the badge.
The short answer: Dolphin Nautilus CC Plus takes the head-to-head edge. It offers steady 1.5 PSI corded power and easy-to-reach top-loading cartridges. Dolphin Nautilus CC only makes sense for strict budgets and light debris where basic floor and wall cleaning is enough. Because neither robot is in our top recommendation tier, we also suggest cross-shopping the Dolphin Cayman (1.5 PSI) before you buy.
Quick Answer
Between these two, pick the Dolphin Nautilus CC Plus for buyers who value a familiar, simple Dolphin platform and find it on sale. It is the more complete option across the measurements and ownership factors we tested.
Consider the Dolphin Nautilus CC only if you specifically prioritize strict budgets and light debris where basic floor and wall cleaning is enough — and compare both against our recommended Dolphin Cayman (1.5 PSI) before checking out.
Our calls in the full reviews are Decent, but there are better buys for the Dolphin Nautilus CC and Decent, but there are better buys for the Dolphin Nautilus CC Plus. Those calls matter here: PSI is the first round, not the entire verdict.
Suction Power: 0.8 PSI vs 1.5 PSI
On our hydro manometer, the Dolphin Nautilus CC measured 0.8 PSI and the Dolphin Nautilus CC Plus measured 1.5 PSI. That gives the Dolphin Nautilus CC Plus a 0.7 PSI advantage, or about 87% more intake pressure than the lower reading.
We measure pressure directly at the intake with the same gauge and pool setup. That is different from manufacturer flow-rate claims in gallons per hour: GPH describes water movement, while PSI shows how hard the intake pulls on debris. Cordless results are recorded at full charge. Our complete pool-robot suction test explains the method and shows where both robots sit on the full board.
The number needs context. It removes daily charging from the equation and covers the core floor-and-wall job. It offers steady 1.5 PSI corded power and easy-to-reach top-loading cartridges. The stronger gauge result gets this round, though intake pressure alone cannot make up for a filter that lets fine debris escape or a routine that makes you handle the robot every day.
Filtration and Debris Handling
The Dolphin Nautilus CC uses basic mesh basket with no nanofilter option. The Dolphin Nautilus CC Plus uses top-loading mesh cartridges without a nanofilter upgrade path.
We give the filtration edge to the Dolphin Nautilus CC Plus. Our comparison favors fine-particle capture, usable debris capacity, easy cleaning, and whether the better filter is included rather than sold as an upgrade.
For leaves, capacity and intake design matter. For pollen, silt, and the haze that dulls otherwise clear water, the filter media matters more. A basic mesh screen can look clean after a run while still passing the smallest material back into the pool.
Automation and Daily Work
The Dolphin Nautilus CC is corded. Simple corded start button without a weekly timer. The Dolphin Nautilus CC Plus is corded. Limited app controls; no full scheduling or steering suite.
Because both are corded, neither needs a recharge. The meaningful question is how much scheduling and remote control each power supply or app provides.
We score automation as a tie.
Coverage and Pool Fit
For the Dolphin Nautilus CC, our review found floor and wall cleaning for standard pools. The Dolphin Nautilus CC Plus is built for floor and walls in standard inground pools.
Coverage is a tie in our scoring, so choose around pool size, shape, and the surfaces you actually need cleaned.
This is where the runner-up can still be the smarter fit for specific pools. A compact pool does not benefit from paying for reach it cannot use, while a pool with a sun shelf, long waterline, or heavy leaf load can expose the limits of a simpler machine quickly.
Value: Performance for the Money and Time
Our value take on the Dolphin Nautilus CC: A basic entry point, but stronger and smarter options cost only a little more. For the Dolphin Nautilus CC Plus: Reliable, but newer Dolphins offer better automation or filtration for similar money.
We score value evenly. In that case, your pool fit should break the tie.
Value is not the same thing as the lowest checkout price. We count cleaning power, filtration, how many surfaces the robot covers, and how often you have to retrieve or charge it. A cheaper robot that leaves you vacuuming behind it is not a bargain, and an expensive robot only earns its price when its extra capability solves a real problem in your pool.
Recommended Upgrade to Cross-Shop: Dolphin Cayman
Neither model in this comparison sits in our top recommendation tier. Before buying, compare them against the Dolphin Cayman (1.5 PSI): Direct recommended step-up in this budget tier: delivers steady 1.5 PSI corded pull with HyperBrush scrubbing, a built-in weekly timer, a one-piece MaxBin, and NanoFilter support. See our direct matchups for Dolphin Nautilus CC vs Dolphin Cayman and Dolphin Nautilus CC Plus vs Dolphin Cayman.
Which One Should You Buy?
- Head-to-head pick — Dolphin Nautilus CC Plus: Best here for buyers who value a familiar, simple Dolphin platform and find it on sale. It offers steady 1.5 PSI corded power and easy-to-reach top-loading cartridges.
- When Dolphin Nautilus CC fits: Only for strict budgets and light debris where basic floor and wall cleaning is enough. It removes daily charging from the equation and covers the core floor-and-wall job.
- Know the main drawback: Dolphin Nautilus CC Plus — The mesh-only filters, limited app, and lack of waterline cleaning make it feel dated. Dolphin Nautilus CC — Its 0.8 PSI reading, basic mesh, and missing timer put it at the bottom of the corded field.
Final Verdict
Dolphin Nautilus CC Plus takes this head-to-head. Dolphin Nautilus CC Plus wins this head-to-head. It offers steady 1.5 PSI corded power and easy-to-reach top-loading cartridges. Dolphin Nautilus CC remains the better fit for strict budgets and light debris where basic floor and wall cleaning is enough, while the Dolphin Cayman is our top-rated step-up near this class.
Read the complete Dolphin Nautilus CC review and Dolphin Nautilus CC Plus review for every test photo, setup detail, and long-form ownership note. You can also return to all pool-robot comparisons to see any other matchup from the 19 cleaners in our test set.
