Head-to-Head Comparison
Dolphin Sigma vs Dolphin Nautilus CC Plus
Our pool experts compare features, filtration, specs, and value to help you pick the right robotic pool cleaner.
Dolphin Nautilus CC Plus or Dolphin Sigma — which wins?
Our pick: the Dolphin Sigma
The Dolphin Sigma is the better pool robot when compared to the Dolphin Nautilus CC Plus, thanks to Sigma's myDolphin Plus App, Triple Commercial-Grade Motors, Gyroscope, longer warranty, and included NanoFilters – giving it the edge over the Dolphin Nautilus CC Plus. Sigma’s powerful motors clean the whole pool, including the waterline, and deliver top-notch performance, making the Sigma one of the best pool robots available.
What Sets Them Apart
Key Differences
Sigma
- Includes NanoFilters™ - Captures small debris other cleaners miss
- Waterline Cleaning - Cleans the pool floor, wall, & waterline
- Triple Commercial Grade Motors - 3 ProLine Motors filter 4500 GPH+
- myDolphin Plus App - Schedule and clean the Sigma from anywhere
- Gyroscope - Gyroscopic sensors control and monitor every movement
- 3 Year Warranty - Longest warranty available
Nautilus CC Plus
- No Waterline Cleaning - Won't clean the dirtest part of your pool
- Utilizes the smaller Gen 1 filter cartridges, rather than utilizing the newer NanoFiltration™ or MaxBin™
- No NanoFilters™ - Nautilus CC Plus cannot clean smaller debris and algae
- Standard Brush - No HyperBrush like on similarly priced models such as Dolphin Cayman
- Overshadowed by the newer Gen 2 models with more features - such as the ProLine and Max-Series
Side by Side
Feature Comparison
The features that matter most when comparing the Dolphin Sigma and Dolphin Nautilus CC Plus.
| Feature | SigmaOur Pick | Nautilus CC Plus |
|---|---|---|
| Standard Filter | ||
| NanoFilters™ | ||
| Wall Climbing | ||
| Waterline Cleaning | ||
| Programmable Weekly Timer | ||
| Gyroscope Navigation | ||
| Dual Stabilizer | ||
| Anti-Tangle Swivel | ||
| 3-Year Warranty |
Explained
Compare Features in Detail
NanoFilters™
Often overlooked, a NanoFilter™ can be the most important part of a pool robot. Without it, microscopic particulate — fine dust, pollen, and algae — passes right through the standard filters found on most robots. These ultra-fine filters trap that debris for a noticeably cleaner, healthier pool. Learn more ›
Programmable Weekly Timer
An automatic pool cleaner should be automatic. A programmable weekly timer sets the robot to clean on a schedule — every day, every other day, or a few times a week — without you turning it on and off.
Dual Stabilizer
Essential for waterline cleaning, dual stabilizers let the unit cling to the walls for a more precise, deeper clean at the waterline — with increased agility and an easy pickup handle.
Anti-Tangle Cable Swivel
Say goodbye to tangled cords. An anti-tangle swivel lets the robot move 360° around your pool without the cord getting tangled, so you can sit back while it cleans. Learn more ›
Warranty Coverage
A robot is only as good as its warranty. The Dolphin Sigma is backed by a 3-year warranty, while the Dolphin Nautilus CC Plus carries a 1-year warranty. Buying through an Authorized Dealer like Poolbots gets you the full manufacturer warranty — never pro-rated or limited by cleaning cycles — plus a 30-day in-pool trial with no restocking fees. Learn more ›
Watch
Videos
See the Dolphin Sigma and Dolphin Nautilus CC Plus in action.
The Details
Specifications
| Sigma | Nautilus CC Plus | |
|---|---|---|
| Part Number | 99991036-SPLI | 99996403-PCF |
| Waterline Cleaning | Yes | No |
| Multi-Media® | No | No |
| Filters Included | 2 | 1 |
| Filter Cleaning | Ultra-fine NanoFilters and Standard Filter Cartridge sets | Top Access |
| Cleaning Coverage | Floor, Walls, Waterline | Floor and Walls |
| Cleaning Cycle | 2.5 hours | 2 hours |
| Number of Brushes | 4 | 2 |
| Cable Length | 60 ft | 60 ft |
| Anti-Tangle Swivel | Yes | Yes |
| Pool Types | In Ground | In Ground |
| Maximum Pool Size | 50 ft | 40 ft |
| Pool Shape | Rectangle, Oval, or Freeform | Rectangle, Oval, or Freeform |
| Obstacles | Steps, Ladder, Drain Cover, Ledges, Pop-Ups | Steps, Ladder, Drain Cover, Ledges, Pop-Ups |
| Surface | Concrete, Plaster, Gunite, Pebble, Tile, Vinyl Liner, Fiberglass | Gunite, Fiberglass, Vinyl, Liner |
| Media-Alert® | No | No |
| Automated Weekly Timer | Yes | Yes |
| Remote Operation | Yes - Through App | No |
| Restocking Fee | No | Yes |
| Warranty | 3 Years | 1 Years |
Go Deeper
Read Our Expert Reviews
Our in-depth reviews are written by pool experts to help you make an informed decision.
Dolphin Sigma
Read Dolphin Sigma ReviewDolphin Nautilus CC Plus
Read Dolphin Nautilus CC Plus ReviewKeep Comparing
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What’s Next?
Still narrowing it down? These expert guides and tools make it easy to find the right pool robot for your pool — most ship free, same day.
Pool Robot Buying Guide
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Robot Selector
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Videos
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Pool Volume Calculator
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