Help me choose
A stronger Pool Express option
Dolphin M550 and Polaris 9300 Sport Pool Cleaner F9300 are compared feature by feature below. For a stronger Pool Express option, consider Clear UV. 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.
Polaris
Polaris 9300 Sport Pool Cleaner F9300
Pools that need floor cleaning.
What we recommend instead
Clear UV
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,999
Buy Clear UVDolphin M550 or Polaris 9300 Sport Pool Cleaner F9300: our take
Dolphin M550 and Polaris 9300 Sport Pool Cleaner F9300 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 has a published maximum pool length of 50 ft; the other model does not have a verified length in our source material. Dolphin M550 cleans floor, walls, and waterline; Polaris 9300 Sport Pool Cleaner F9300 cleans floor. Dolphin M550's documented cleaning system includes 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. That gives Dolphin M550 the clearer documented edge for fine silt, pollen and sand. Dolphin M550 also has the better documented path for bulky leaves and larger debris.
Controls and day-to-day ownership
Dolphin M550 provides a weekly timer and smartphone control; Polaris 9300 Sport Pool Cleaner F9300 provides daily scheduling. Dolphin M550 uses continuous corded power, while Polaris 9300 Sport Pool Cleaner F9300 uses a 60 ft corded cable. Dolphin M550 is listed at 22.6 lb versus 18 lb for Polaris 9300 Sport Pool Cleaner F9300; that 4.600000000000001 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin M550 is listed at $1,999 and Polaris 9300 Sport Pool Cleaner F9300 at $1,393.60; Polaris 9300 Sport Pool Cleaner F9300 is $605.40 less. Dolphin M550 and Polaris 9300 Sport Pool Cleaner F9300 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Clear UV. 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 | Polaris 9300 Sport Pool Cleaner F9300 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | YesEdge | No |
| Scrubs the waterline | YesEdge | No |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | YesEdge | No |
| Automatic scheduling | Yes | Yes |
| Smartphone app | Yes | Not listed |
| Anti-tangle swivel | Yes | Not listed |
| 3-year warranty | Yes | Not listed |
| 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 inground pools up to 50 ft that need floor, wall and waterline cleaning with app control, Pick-Up and a caddy.
- 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
- Can start on a weekly schedule without a manual launch before every cycle
Where Polaris 9300 Sport Pool Cleaner F9300 stands out
Polaris 9300 Sport Pool Cleaner F9300 is the better fit for shoppers prioritizing the lower $1,393.60 starting price.
- Is listed $605.40 lower
- Weighs 18 lb versus 22.6 lb
Dolphin M550 vs Polaris 9300 Sport Pool Cleaner F9300 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 | Polaris 9300 Sport Pool Cleaner F9300 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning with app control, Pick-Up and a caddy. | Pools that need floor cleaning. |
| Starting price | $1,999 | $1,393.60 |
| Pool type | Inground | Not listed |
| Maximum pool length | Up to 50 ft | Not listed |
| Cleaning coverage | Floor, Walls, Waterline | Floor |
| Power | Corded | Corded |
| Filtration | Basket, UltraFilter | Not listed |
| Scheduling | Weekly schedule + app | Daily schedule |
| App and remote | App control | Not listed |
| Cable | Not listed | 60 ft |
| Robot weight | 22.6 lb | 18 lb |
| Warranty | 3 years | Not listed |
Consider the stronger Pool Express option
Dolphin M550 and Polaris 9300 Sport Pool Cleaner F9300 are compared feature by feature below. For a stronger Pool Express option, consider Clear UV. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
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