Help me choose
Our pick: Dolphin Sigma
Dolphin Sigma is the Pool Express pick in this matchup. Dolphin Sigma cleans the floor, walls and waterline instead of stopping below the tile line. Dolphin Sigma includes filtration for sand, pollen and other fine debris.
ProLine
Dolphin Sigma
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Polaris
Polaris 9300 Sport Pool Cleaner F9300
Pools that need floor cleaning.
Why Dolphin Sigma is our pick
Dolphin Sigma
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$2,399
Buy Dolphin SigmaDolphin Sigma or Polaris 9300 Sport Pool Cleaner F9300: our take
Dolphin Sigma 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 Sigma has a published maximum pool length of 50 ft; the other model does not have a verified length in our source material. Dolphin Sigma cleans floor, walls, and waterline; Polaris 9300 Sport Pool Cleaner F9300 cleans floor. Dolphin Sigma's documented cleaning system includes 2 active brushes, SmartNav 3.0 with gyroscope navigation, and Triple commercial-grade DC motors.
Filtration and debris
Dolphin Sigma has documented included filtration—Standard filter and NanoFilters—while the other model's included media is not fully published. That gives Dolphin Sigma the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin Sigma provides a weekly timer, smartphone control, and included remote control; Polaris 9300 Sport Pool Cleaner F9300 provides daily scheduling. Dolphin Sigma uses a 55 ft corded cable with an anti-tangle swivel, while Polaris 9300 Sport Pool Cleaner F9300 uses a 60 ft corded cable. Dolphin Sigma is listed at 24.6 lb versus 18 lb for Polaris 9300 Sport Pool Cleaner F9300; that 6.600000000000001 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Sigma is listed at $2,399 and Polaris 9300 Sport Pool Cleaner F9300 at $1,393.60; Polaris 9300 Sport Pool Cleaner F9300 is $1,005.40 less. Pool Express pick: Dolphin Sigma. Dolphin Sigma cleans the floor, walls and waterline instead of stopping below the tile line. Dolphin Sigma includes filtration for sand, pollen and other fine debris. Choose Polaris 9300 Sport Pool Cleaner F9300 when it is the better fit for shoppers prioritizing the lower $1,393.60 starting price.
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 Sigma | 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 | No | 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 Sigma stands out
Dolphin Sigma is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Includes filtration for sand, pollen and other fine debris
- Can start on a weekly schedule without a manual launch before every cycle
- Has documented smartphone control
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 $1,005.40 lower
- Weighs 18 lb versus 24.6 lb
Dolphin Sigma 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 Sigma | Polaris 9300 Sport Pool Cleaner F9300 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. | Pools that need floor cleaning. |
| Starting price | $2,399 | $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 | Standard filter, NanoFilters | Not listed |
| Scheduling | Weekly schedule + app | Daily schedule |
| App and remote | App + included remote | Not listed |
| Cable | 55 ft with anti-tangle swivel | 60 ft |
| Robot weight | 24.6 lb | 18 lb |
| Warranty | 3 years | Not listed |
Choose Dolphin Sigma
Dolphin Sigma is the Pool Express pick in this matchup. Dolphin Sigma cleans the floor, walls and waterline instead of stopping below the tile line. Dolphin Sigma includes filtration for sand, pollen and other fine debris.
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