Help me choose
A stronger Pool Express option
Dolphin Active 30 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.
Active
Dolphin Active 30
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
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 QuantumDolphin Active 30 or Dolphin M550: our take
Dolphin Active 30 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
Both robots are 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 Active 30 lists 1 active brush and CleverClean navigation. Dolphin M550 lists 2 active brushes and CleverClean navigation.
Filtration and debris
Both models include Basket and UltraFilter. 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 Active 30 provides a weekly timer, smartphone control, and included remote control; Dolphin M550 provides a weekly timer and smartphone control. Dolphin Active 30 uses a 60 ft corded cable with an anti-tangle swivel, while Dolphin M550 uses continuous corded power.
Price, warranty and the decision
Dolphin Active 30 is listed at $1,499 and Dolphin M550 at $1,999; Dolphin Active 30 is $500 less. Dolphin Active 30 lists a 2-year warranty compared with 3 years for Dolphin M550. Dolphin Active 30 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 | Dolphin Active 30 | Dolphin M550 |
|---|---|---|
| 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 | Yes | Yes |
| 3-year warranty | No | YesEdge |
| 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 Active 30 stands out
Dolphin Active 30 is the better fit for shoppers prioritizing the lower $1,499 starting price.
- Is listed $500 lower
- 60 ft cable with anti-tangle swivel
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.
- Uses 2 active brushes instead of 1
- Carries a 3-year warranty instead of 2 years
Dolphin Active 30 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 | Dolphin Active 30 | Dolphin M550 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. | Inground pools up to 50 ft that need floor, wall and waterline cleaning with app control, Pick-Up and a caddy. |
| Starting price | $1,499 | $1,999 |
| Pool type | Inground | Inground |
| Maximum pool length | Up to 50 ft | Up to 50 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Corded | Corded |
| Filtration | Basket, UltraFilter | Basket, UltraFilter |
| Scheduling | Weekly schedule + app | Weekly schedule + app |
| App and remote | App + included remote | App control |
| Cable | 60 ft with anti-tangle swivel | Not listed |
| Robot weight | Not listed | 22.6 lb |
| Warranty | 2 years | 3 years |
Consider the stronger Pool Express option
Dolphin Active 30 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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