Help me choose
A stronger Pool Express option
Dolphin EON 120d and Dolphin Nautilus Pool Up 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.
EON
Dolphin EON 120d
Inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with minimal filter maintenance and a three-year warranty.
Nautilus
Dolphin Nautilus Pool Up
Inground and above-ground pools up to 30 ft that need floor and wall cleaning, with heavy leaves.
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 EON 120d or Dolphin Nautilus Pool Up: our take
Dolphin EON 120d and Dolphin Nautilus Pool Up 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 and above-ground pools. Dolphin EON 120d is rated for pools up to 50 ft; Dolphin Nautilus Pool Up is rated up to 30 ft. Dolphin EON 120d cleans floor, walls, and waterline; Dolphin Nautilus Pool Up cleans floor and walls. Dolphin EON 120d lists SmartMap navigation. Dolphin Nautilus Pool Up lists 1 active brush.
Filtration and debris
Dolphin EON 120d includes Basket and UltraFilter; Dolphin Nautilus Pool Up includes Oversized leaf bag. That gives Dolphin EON 120d the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin EON 120d provides a weekly timer and smartphone control; Dolphin Nautilus Pool Up provides one-touch starts and power-supply controls. Dolphin EON 120d uses cordless battery power, while Dolphin Nautilus Pool Up uses a 40 ft corded cable. Dolphin EON 120d is listed at 24.3 lb versus 18 lb for Dolphin Nautilus Pool Up; that 6.300000000000001 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin EON 120d lists a 3-year warranty compared with 2 years for Dolphin Nautilus Pool Up. Dolphin EON 120d and Dolphin Nautilus Pool Up 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 EON 120d | Dolphin Nautilus Pool Up |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | YesEdge | No |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | YesEdge | No |
| Smartphone app | YesEdge | No |
| Anti-tangle swivel | Not listed | Not listed |
| 3-year warranty | YesEdge | No |
| No recharging between cycles | No | YesEdge |
| 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 EON 120d stands out
Dolphin EON 120d is the better fit for owners who value cordless handling more than automatic scheduling and continuous power.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Includes filtration for sand, pollen and other fine debris
- Can start on a weekly schedule without a manual launch before every cycle
- Adds smartphone control
Where Dolphin Nautilus Pool Up stands out
Dolphin Nautilus Pool Up is the better fit for inground and above-ground pools up to 30 ft that need floor and wall cleaning, with heavy leaves.
- Includes an oversized leaf bag for bulky seasonal debris
- Runs from continuous plug-in power without a recharge between cycles
- Weighs 18 lb versus 24.3 lb
Dolphin EON 120d vs Dolphin Nautilus Pool Up 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 EON 120d | Dolphin Nautilus Pool Up |
|---|---|---|
| Best fit | Inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with minimal filter maintenance and a three-year warranty. | Inground and above-ground pools up to 30 ft that need floor and wall cleaning, with heavy leaves. |
| Starting price | See product | $499 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 50 ft | Up to 30 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls |
| Power | Cordless | Corded |
| Filtration | Basket, UltraFilter | Oversized leaf bag |
| Scheduling | Weekly schedule + app | One-touch start |
| App and remote | App control | Power-supply controls |
| Cable | Cordless | 40 ft |
| Robot weight | 24.3 lb | 18 lb |
| Warranty | 3 years | 2 years |
Consider the stronger Pool Express option
Dolphin EON 120d and Dolphin Nautilus Pool Up 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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