Help me choose
A stronger Pool Express option
Dolphin Premium 20 and Dolphin Proteus DX4 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.
Premium
Dolphin Premium 20
Inground and above-ground pools up to 33 ft that need floor and wall cleaning.
Proteus
Dolphin Proteus DX4
Inground pools that need floor, wall and waterline cleaning.
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 Premium 20 or Dolphin Proteus DX4: our take
Dolphin Premium 20 and Dolphin Proteus DX4 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 Premium 20 is intended for inground and above-ground pools, while Dolphin Proteus DX4 is intended for inground pools. Dolphin Premium 20 has a published maximum pool length of 33 ft; the other model does not have a verified length in our source material. Dolphin Premium 20 cleans floor and walls; Dolphin Proteus DX4 cleans floor, walls, and waterline. Dolphin Premium 20 lists 1 active brush and CleverClean navigation. Dolphin Proteus DX4 lists 1 active brush.
Filtration and debris
Both models include Basket.
Controls and day-to-day ownership
Dolphin Premium 20 provides one-touch starts and power-supply controls; Dolphin Proteus DX4 provides a weekly timer and power-supply controls. Dolphin Premium 20 uses continuous corded power, while Dolphin Proteus DX4 uses a 60 ft corded cable with an anti-tangle swivel.
Price, warranty and the decision
Dolphin Premium 20 is listed at $899 and Dolphin Proteus DX4 at $1,199; Dolphin Premium 20 is $300 less. Each lists a 2-year manufacturer warranty. Dolphin Premium 20 and Dolphin Proteus DX4 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 Premium 20 | Dolphin Proteus DX4 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | YesEdge |
| Fine-debris filter included | No | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | No | YesEdge |
| Smartphone app | No | No |
| Anti-tangle swivel | No | YesEdge |
| 3-year warranty | No | 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 Premium 20 stands out
Dolphin Premium 20 is the better fit for shoppers prioritizing the lower $899 starting price.
- Is listed $300 lower
- Cleans floor and walls
Where Dolphin Proteus DX4 stands out
Dolphin Proteus DX4 is the better fit for inground pools that need floor, wall and waterline cleaning.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Can start on a weekly schedule without a manual launch before every cycle
- Uses an anti-tangle swivel cable
Dolphin Premium 20 vs Dolphin Proteus DX4 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 Premium 20 | Dolphin Proteus DX4 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 33 ft that need floor and wall cleaning. | Inground pools that need floor, wall and waterline cleaning. |
| Starting price | $899 | $1,199 |
| Pool type | Inground, Above-ground | Inground |
| Maximum pool length | Up to 33 ft | Not listed |
| Cleaning coverage | Floor, Walls | Floor, Walls, Waterline |
| Power | Corded | Corded |
| Filtration | Basket | Basket |
| Scheduling | One-touch start | Weekly schedule |
| App and remote | Power-supply controls | Power-supply controls |
| Cable | Not listed | 60 ft with anti-tangle swivel |
| Robot weight | 14.6 lb | Not listed |
| Warranty | 2 years | 2 years |
Consider the stronger Pool Express option
Dolphin Premium 20 and Dolphin Proteus DX4 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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