Help me choose
A stronger Pool Express option
Aquabot Rapids 2500 and Dolphin M550 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.
Aquabot
Aquabot Rapids 2500
Inground and above-ground pools up to 50 ft that need floor, wall and waterline cleaning.
M-Line
Dolphin M550
Inground pools up to 50 ft that need floor, wall and waterline cleaning with app control, Pick-Up and a caddy.
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 QuantumAquabot Rapids 2500 or Dolphin M550: our take
Aquabot Rapids 2500 and Dolphin M550 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
Aquabot Rapids 2500 is intended for inground and above-ground pools, while Dolphin M550 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. Aquabot Rapids 2500 lists Gyroscope navigation. Dolphin M550 lists 2 active brushes and CleverClean navigation.
Filtration and debris
Dolphin M550 has documented included filtration—Basket and UltraFilter—while the other model's included media is not fully published. Dolphin M550 has the clearer documented edge for fine silt, pollen and sand. Dolphin M550 has the better documented path for bulky leaves and larger debris.
Controls and day-to-day ownership
Aquabot Rapids 2500 provides smartphone control; Dolphin M550 provides a weekly timer and smartphone control.
Price, warranty and the decision
Aquabot Rapids 2500 is listed at $999 and Dolphin M550 at $1,999; Aquabot Rapids 2500 is $1,000 less. Aquabot Rapids 2500 lists a 2-year warranty compared with 3 years for Dolphin M550. Aquabot Rapids 2500 and Dolphin M550 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 | Aquabot Rapids 2500 | Dolphin M550 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| 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 Aquabot Rapids 2500 stands out
Aquabot Rapids 2500 is the better fit for shoppers prioritizing the lower $999 starting price.
- Adds gyroscope-assisted navigation
- Is listed $1,000 lower
Where Dolphin M550 stands out
Dolphin M550 is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning with app control, Pick-Up and a caddy.
- 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
Aquabot Rapids 2500 vs Dolphin M550 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 | Aquabot Rapids 2500 | Dolphin M550 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 50 ft that need floor, wall and waterline cleaning. | Inground pools up to 50 ft that need floor, wall and waterline cleaning with app control, Pick-Up and a caddy. |
| Starting price | $999 | $1,999 |
| 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 | 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 | 22.6 lb |
| Warranty | 2 years | 3 years |
Consider the stronger Pool Express option
Aquabot Rapids 2500 and Dolphin M550 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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