Help me choose
A stronger Pool Express option
Dolphin Explorer E25 and Dolphin Oasis Z5i 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.
Explorer
Dolphin Explorer E25
Inground pools up to 50 ft that need floor and wall cleaning.
Oasis
Dolphin Oasis Z5i
Inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling.
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 Explorer E25 or Dolphin Oasis Z5i: our take
Dolphin Explorer E25 and Dolphin Oasis Z5i 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. Both are rated for pools up to 50 ft. Dolphin Explorer E25 cleans floor and walls; Dolphin Oasis Z5i cleans floor, walls, and waterline. Dolphin Oasis Z5i's documented cleaning system includes CleverClean navigation.
Filtration and debris
Dolphin Oasis Z5i has documented included filtration—Basket and UltraFilter—while the other model's included media is not fully published. Dolphin Oasis Z5i has the clearer documented edge for fine silt, pollen and sand. Dolphin Oasis Z5i has the better documented path for bulky leaves and larger debris.
Controls and day-to-day ownership
Dolphin Explorer E25 provides smartphone control; Dolphin Oasis Z5i provides a weekly timer and smartphone control.
Price, warranty and the decision
Dolphin Explorer E25 lists a 2-year warranty compared with 3 years for Dolphin Oasis Z5i. Dolphin Explorer E25 and Dolphin Oasis Z5i 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 Explorer E25 | Dolphin Oasis Z5i |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | YesEdge |
| Fine-debris filter included | No | YesEdge |
| Large-debris filter | No | YesEdge |
| Automatic scheduling | Not listed | Yes |
| Smartphone app | Yes | Yes |
| Anti-tangle swivel | Not listed | Yes |
| 3-year warranty | No | YesEdge |
| No recharging between cycles | Not listed | 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 Explorer E25 stands out
Dolphin Explorer E25 is the better fit for inground pools up to 50 ft that need floor and wall cleaning.
- Cleans floor and walls
- Smartphone app control
Where Dolphin Oasis Z5i stands out
Dolphin Oasis Z5i is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Includes filtration for sand, pollen and other fine debris
- Includes a large-debris bin or bag for leaves
- Carries a 3-year warranty instead of 2 years
Dolphin Explorer E25 vs Dolphin Oasis Z5i 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 Explorer E25 | Dolphin Oasis Z5i |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor and wall cleaning. | Inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling. |
| Starting price | $899 | See product |
| Pool type | Inground | Inground |
| Maximum pool length | Up to 50 ft | Up to 50 ft |
| Cleaning coverage | Floor, Walls | Floor, Walls, Waterline |
| Power | Not listed | Corded |
| Filtration | Not listed | Basket, UltraFilter |
| Scheduling | Not listed | Weekly schedule + app |
| App and remote | App control | App control |
| Cable | Not listed | Not listed |
| Robot weight | Not listed | 26.7 lb |
| Warranty | 2 years | 3 years |
Consider the stronger Pool Express option
Dolphin Explorer E25 and Dolphin Oasis Z5i 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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