Help me choose
A stronger Pool Express option
Dolphin EON 120d and Dolphin Nautilus EON 120d 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.
EON
Dolphin Nautilus EON 120d
Inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with the least filter maintenance.
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 EON 120d: our take
Dolphin EON 120d and Dolphin Nautilus EON 120d 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. Both are rated for pools up to 50 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin EON 120d lists SmartMap navigation. Dolphin Nautilus EON 120d lists 2 active brushes and SmartMap navigation.
Filtration and debris
Both models include Basket and UltraFilter. Both have documented fine-debris media, so basket capacity and ease of cleaning matter more than fine-particle capability.
Controls and day-to-day ownership
Both models provide a weekly timer and smartphone control. Both use cordless battery power. Both are listed at 24.3 lb, so lifting effort is effectively the same.
Price, warranty and the decision
Dolphin EON 120d lists a 3-year warranty compared with 1 years for Dolphin Nautilus EON 120d. Dolphin EON 120d and Dolphin Nautilus EON 120d 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 EON 120d |
|---|---|---|
| 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 | Yes | Yes |
| Automatic scheduling | Yes | Yes |
| Smartphone app | Yes | Yes |
| Anti-tangle swivel | Not listed | Not listed |
| 3-year warranty | YesEdge | No |
| No recharging between cycles | No | No |
| 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 inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with minimal filter maintenance and a three-year warranty.
- Carries a 3-year warranty instead of 1 years
- DebrisLock self-backwashing filter
Where Dolphin Nautilus EON 120d stands out
Dolphin Nautilus EON 120d is the better fit for inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with the least filter maintenance.
- DebrisLock self-backwashing 14-micron filter
- Cordless, up to 2.5 weeks of cleaning per charge
Dolphin EON 120d vs Dolphin Nautilus EON 120d 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 EON 120d |
|---|---|---|
| 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 50 ft that need whole-pool cordless cleaning with the least filter maintenance. |
| Starting price | See product | $1,199 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 50 ft | Up to 50 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Cordless | Cordless |
| Filtration | Basket, UltraFilter | Basket, UltraFilter |
| Scheduling | Weekly schedule + app | Weekly schedule + app |
| App and remote | App control | App control |
| Cable | Cordless | Cordless |
| Robot weight | 24.3 lb | 24.3 lb |
| Warranty | 3 years | 1 years |
Consider the stronger Pool Express option
Dolphin EON 120d and Dolphin Nautilus EON 120d 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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