Robotic pool cleaner comparison

Dolphin S50 vs Polaris 9300 Sport Pool Cleaner F9300

A side-by-side comparison of pool fit, cleaning coverage, filtration, controls and the better Pool Express option.

By Brian Williamson, Pool Express product specialist
Updated November 9, 2026

Better alternative

A stronger Pool Express option

Dolphin S50 and Polaris 9300 Sport Pool Cleaner F9300 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Escape. Inground and above-ground pools up to 30 ft that need floor cleaning.

Buy Dolphin Escape Compare every robot

S-Line

Dolphin S50

Above-ground pools up to 30 ft that need floor cleaning.

Listed price $649

View better alternatives

Polaris

Polaris 9300 Sport Pool Cleaner F9300

Pools that need floor cleaning.

Listed price $1,393.60

View better alternatives

A better alternative

What we recommend instead

Pool Express pick

Dolphin Escape

Inground and above-ground pools up to 30 ft that need floor cleaning.

$669

Buy Dolphin Escape

Buying guidance

Dolphin S50 or Polaris 9300 Sport Pool Cleaner F9300: our take

Dolphin S50 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 S50 has a published maximum pool length of 30 ft; the other model does not have a verified length in our source material. Each cleans floor, so coverage alone does not separate them. Dolphin S50's documented cleaning system includes 1 active brush.

Filtration and debris

Dolphin S50 has documented included filtration—Basket—while the other model's included media is not fully published. Dolphin S50 also has the better documented path for bulky leaves and larger debris.

Controls and day-to-day ownership

Dolphin S50 provides one-touch starts and power-supply controls; Polaris 9300 Sport Pool Cleaner F9300 provides daily scheduling. Dolphin S50 uses a 40 ft corded cable, while Polaris 9300 Sport Pool Cleaner F9300 uses a 60 ft corded cable. Dolphin S50 is listed at 14 lb versus 18 lb for Polaris 9300 Sport Pool Cleaner F9300; that 4 lb difference matters when lifting the robot from the pool.

Price, warranty and the decision

Dolphin S50 is listed at $649 and Polaris 9300 Sport Pool Cleaner F9300 at $1,393.60; Dolphin S50 is $744.60 less. Dolphin S50 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 Dolphin Escape. Inground and above-ground pools up to 30 ft that need floor cleaning.

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 S50	Polaris 9300 Sport Pool Cleaner F9300
Cleans the pool floor	Yes	Yes
Climbs and cleans walls	No	No
Scrubs the waterline	No	No
Fine-debris filter included	No	No
Large-debris filter	YesEdge	No
Automatic scheduling	No	YesEdge
Smartphone app	No	Not listed
Anti-tangle swivel	Not listed	Not listed
3-year warranty	No	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 S50 stands out

Dolphin S50 is the better fit for shoppers prioritizing the lower $649 starting price.

Includes a large-debris bin or bag for leaves
Is listed $744.60 lower
Weighs 14 lb versus 18 lb

Where Polaris 9300 Sport Pool Cleaner F9300 stands out

Polaris 9300 Sport Pool Cleaner F9300 is the better fit for pools that need floor cleaning.

60 ft cable
Daily timer