Help me choose
A stronger Pool Express option
Dolphin M550 and Dolphin Premium 30 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.
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.
Premium
Dolphin Premium 30
Inground and above-ground pools up to 50 ft that need floor, wall and waterline cleaning on a weekly timer.
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 M550 or Dolphin Premium 30: our take
Dolphin M550 and Dolphin Premium 30 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 M550 is intended for inground pools, while Dolphin Premium 30 is intended for inground and above-ground pools. Both are rated for pools up to 50 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin M550's documented cleaning system includes 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 M550 provides a weekly timer and smartphone control; Dolphin Premium 30 provides a weekly timer and power-supply controls. Both use continuous corded power. Dolphin M550 is listed at 22.6 lb versus 18.4 lb for Dolphin Premium 30; that 4.200000000000003 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin M550 is listed at $1,999 and Dolphin Premium 30 at $1,279; Dolphin Premium 30 is $720 less. Dolphin M550 lists a 3-year warranty compared with 2 years for Dolphin Premium 30. Dolphin M550 and Dolphin Premium 30 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 M550 | Dolphin Premium 30 |
|---|---|---|
| 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 | 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 M550 stands out
Dolphin M550 is the better fit for owners who put smartphone control first.
- Adds smartphone control
- Carries a 3-year warranty instead of 2 years
Where Dolphin Premium 30 stands out
Dolphin Premium 30 is the better fit for shoppers prioritizing the lower $1,279 starting price.
- Is listed $720 lower
- Weighs 18.4 lb versus 22.6 lb
Dolphin M550 vs Dolphin Premium 30 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 M550 | Dolphin Premium 30 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning with app control, Pick-Up and a caddy. | Inground and above-ground pools up to 50 ft that need floor, wall and waterline cleaning on a weekly timer. |
| Starting price | $1,999 | $1,279 |
| Pool type | Inground | Inground, Above-ground |
| 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 and remote | App control | Power-supply controls |
| Cable | Not listed | Not listed |
| Robot weight | 22.6 lb | 18.4 lb |
| Warranty | 3 years | 2 years |
Consider the stronger Pool Express option
Dolphin M550 and Dolphin Premium 30 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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