Help me choose
A stronger Pool Express option
Dolphin Oasis Z5i 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.
Oasis
Dolphin Oasis Z5i
Inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling.
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 Oasis Z5i or Dolphin Proteus DX4: our take
Dolphin Oasis Z5i 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
Both robots are intended for inground pools. Dolphin Oasis Z5i has a published maximum pool length of 50 ft; the other model does not have a verified length in our source material. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin Oasis Z5i lists CleverClean navigation. Dolphin Proteus DX4 lists 1 active brush.
Filtration and debris
Dolphin Oasis Z5i includes Basket and UltraFilter; Dolphin Proteus DX4 includes Basket. That gives Dolphin Oasis Z5i the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin Oasis Z5i provides a weekly timer and smartphone control; Dolphin Proteus DX4 provides a weekly timer and power-supply controls. Dolphin Oasis Z5i 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 Oasis Z5i lists a 3-year warranty compared with 2 years for Dolphin Proteus DX4. Dolphin Oasis Z5i 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 Oasis Z5i | Dolphin Proteus DX4 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Yes | Yes |
| Smartphone app | YesEdge | No |
| 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 Oasis Z5i stands out
Dolphin Oasis Z5i is the better fit for owners who put smartphone control first.
- Includes filtration for sand, pollen and other fine debris
- Adds smartphone control
- Carries a 3-year warranty instead of 2 years
Where Dolphin Proteus DX4 stands out
Dolphin Proteus DX4 is the better fit for inground pools that need floor, wall and waterline cleaning.
- 60 ft cable with anti-tangle swivel
- Top-load filter basket
Dolphin Oasis Z5i 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 Oasis Z5i | Dolphin Proteus DX4 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling. | Inground pools that need floor, wall and waterline cleaning. |
| Starting price | See product | $1,199 |
| Pool type | Inground | Inground |
| Maximum pool length | Up to 50 ft | Not listed |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Corded | Corded |
| Filtration | Basket, UltraFilter | Basket |
| Scheduling | Weekly schedule + app | Weekly schedule |
| App and remote | App control | Power-supply controls |
| Cable | Not listed | 60 ft with anti-tangle swivel |
| Robot weight | 26.7 lb | Not listed |
| Warranty | 3 years | 2 years |
Consider the stronger Pool Express option
Dolphin Oasis Z5i 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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