Help me choose
A stronger Pool Express option
Dolphin Nautilus CC Supreme and Dolphin S400 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Nautilus
Dolphin Nautilus CC Supreme
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
S-Line
Dolphin S400
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
What we recommend instead
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin QuantumDolphin Nautilus CC Supreme or Dolphin S400: our take
Dolphin Nautilus CC Supreme and Dolphin S400 are compared on pool fit, cleaning reach, debris handling, controls and ownership details. The recommendation is based on the job the robot must do—not a simple feature count.
Pool fit and cleaning reach
Both robots are intended for inground pools. Both are rated for pools up to 50 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin Nautilus CC Supreme's documented cleaning system includes 2 active brushes and CleverClean navigation.
Filtration and debris
Dolphin Nautilus CC Supreme includes Standard filter and UltraFilter; Dolphin S400 includes Basket and UltraFilter. Both have documented fine-debris media, so basket capacity and ease of cleaning matter more than fine-particle capability. Dolphin S400 has the better documented path for bulky leaves and larger debris.
Controls and day-to-day ownership
Dolphin Nautilus CC Supreme provides a weekly timer, smartphone control, and included remote control; Dolphin S400 provides a weekly timer and smartphone control. Both use a 60 ft corded cable with an anti-tangle swivel.
Price, warranty and the decision
Dolphin Nautilus CC Supreme is listed at $1,599 and Dolphin S400 at $1,799; Dolphin Nautilus CC Supreme is $200 less. Dolphin Nautilus CC Supreme lists a 3-year warranty compared with 2 years for Dolphin S400. Dolphin Nautilus CC Supreme and Dolphin S400 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Feature check: what each robot actually has
A green check means the feature is documented as included. A red X means it is documented as absent. A dash means the source does not make the feature clear.
| Feature | Dolphin Nautilus CC Supreme | Dolphin S400 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | Yes | Yes |
| Large-debris filter | No | YesEdge |
| Automatic scheduling | Yes | Yes |
| Smartphone app | Yes | Yes |
| Anti-tangle swivel | Yes | Yes |
| 3-year warranty | YesEdge | No |
| No recharging between cycles | Yes | Yes |
| Built-in UV-C water treatment | No | No |
Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.
Where Dolphin Nautilus CC Supreme stands out
Dolphin Nautilus CC Supreme is the better fit for shoppers prioritizing the lower $1,599 starting price.
- Carries a 3-year warranty instead of 2 years
- Is listed $200 lower
Where Dolphin S400 stands out
Dolphin S400 is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
- Includes a large-debris bin or bag for leaves
- Top-load filter basket and ultrafine filters
Dolphin Nautilus CC Supreme vs Dolphin S400 specifications
Use pool fit first. Price and app control do not make up for a robot that cannot cover the length or surfaces you need cleaned.
| Specification | Dolphin Nautilus CC Supreme | Dolphin S400 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. |
| Starting price | $1,599 | $1,799 |
| Pool type | Inground | Inground |
| Maximum pool length | Up to 50 ft | Up to 50 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Corded | Corded |
| Filtration | Standard filter, UltraFilter | Basket, UltraFilter |
| Scheduling | Weekly schedule + app | Weekly schedule + app |
| App and remote | App + included remote | App control |
| Cable | 60 ft with anti-tangle swivel | 60 ft with anti-tangle swivel |
| Robot weight | Not listed | Not listed |
| Warranty | 3 years | 2 years |
Consider the stronger Pool Express option
Dolphin Nautilus CC Supreme and Dolphin S400 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
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