Help me choose
Our pick: Dolphin Quantum
Dolphin Quantum is the Pool Express pick in this matchup. Dolphin Quantum uses the high-capacity XXL MaxBin for easier top-load debris handling. Dolphin Quantum carries a 2-year warranty instead of 1 years.
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.
ProLine
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Why Dolphin Quantum is our pick
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin QuantumDolphin Nautilus EON 120d or Dolphin Quantum: our take
Dolphin Nautilus EON 120d and Dolphin Quantum 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
Dolphin Nautilus EON 120d is intended for inground and above-ground pools, while Dolphin Quantum is 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 EON 120d lists 2 active brushes and SmartMap navigation. Dolphin Quantum lists 2 active brushes, SmartNav 2.0 navigation, and Dual DC motors.
Filtration and debris
Dolphin Nautilus EON 120d includes Basket and UltraFilter; Dolphin Quantum includes XXL MaxBin and NanoFilters. 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
Dolphin Nautilus EON 120d provides a weekly timer and smartphone control; Dolphin Quantum provides a weekly timer, smartphone control, and included remote control. Dolphin Nautilus EON 120d uses cordless battery power, while Dolphin Quantum uses a 60 ft corded cable with an anti-tangle swivel. Dolphin Nautilus EON 120d is listed at 24.3 lb versus 18.3 lb for Dolphin Quantum; that 6 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Nautilus EON 120d is listed at $1,199 and Dolphin Quantum at $1,649; Dolphin Nautilus EON 120d is $450 less. Dolphin Nautilus EON 120d lists a 1-year warranty compared with 2 years for Dolphin Quantum. Pool Express pick: Dolphin Quantum. Dolphin Quantum uses the high-capacity XXL MaxBin for easier top-load debris handling. Dolphin Quantum carries a 2-year warranty instead of 1 years. Choose Dolphin Nautilus EON 120d when it is the better fit for shoppers prioritizing the lower $1,199 starting price.
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 EON 120d | Dolphin Quantum |
|---|---|---|
| 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 | Yes |
| 3-year warranty | No | 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 Nautilus EON 120d stands out
Dolphin Nautilus EON 120d is the better fit for shoppers prioritizing the lower $1,199 starting price.
- Is listed $450 lower
- Cleans floor, walls, waterline, steps and 8 in ledges
Where Dolphin Quantum stands out
Dolphin Quantum is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
- Uses the high-capacity XXL MaxBin for easier top-load debris handling
- Carries a 2-year warranty instead of 1 years
- Runs from continuous plug-in power without a recharge between cycles
- Weighs 18.3 lb versus 24.3 lb
Dolphin Nautilus EON 120d vs Dolphin Quantum 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 EON 120d | Dolphin Quantum |
|---|---|---|
| Best fit | Inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with the least filter maintenance. | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. |
| Starting price | $1,199 | $1,649 |
| Pool type | Inground, Above-ground | Inground |
| Maximum pool length | Up to 50 ft | Up to 50 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Cordless | Corded |
| Filtration | Basket, UltraFilter | XXL MaxBin, NanoFilters |
| Scheduling | Weekly schedule + app | Weekly schedule + app |
| App and remote | App control | App + included remote |
| Cable | Cordless | 60 ft with anti-tangle swivel |
| Robot weight | 24.3 lb | 18.3 lb |
| Warranty | 1 years | 2 years |
Choose Dolphin Quantum
Dolphin Quantum is the Pool Express pick in this matchup. Dolphin Quantum uses the high-capacity XXL MaxBin for easier top-load debris handling. Dolphin Quantum carries a 2-year warranty instead of 1 years.
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