Help me choose
A stronger Pool Express option
Dolphin Liberty 400 and Polaris 9300 Sport Pool Cleaner F9300 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.
Liberty
Dolphin Liberty 400
Inground and above-ground pools up to 33 ft that need floor, wall and waterline cleaning without a cord.
Polaris
Polaris 9300 Sport Pool Cleaner F9300
Pools that need floor cleaning.
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 Liberty 400 or Polaris 9300 Sport Pool Cleaner F9300: our take
Dolphin Liberty 400 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 Liberty 400 has a published maximum pool length of 33 ft; the other model does not have a verified length in our source material. Dolphin Liberty 400 cleans floor, walls, and waterline; Polaris 9300 Sport Pool Cleaner F9300 cleans floor.
Filtration and debris
Dolphin Liberty 400 has documented included filtration—Basket and UltraFilter—while the other model's included media is not fully published. That gives Dolphin Liberty 400 the clearer documented edge for fine silt, pollen and sand. Dolphin Liberty 400 also has the better documented path for bulky leaves and larger debris.
Controls and day-to-day ownership
Dolphin Liberty 400 provides a weekly timer and smartphone control; Polaris 9300 Sport Pool Cleaner F9300 provides daily scheduling. Dolphin Liberty 400 uses cordless battery power, while Polaris 9300 Sport Pool Cleaner F9300 uses a 60 ft corded cable. Dolphin Liberty 400 is listed at 17.9 lb versus 18 lb for Polaris 9300 Sport Pool Cleaner F9300; that 0.10000000000000142 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Liberty 400 is listed at $1,429 and Polaris 9300 Sport Pool Cleaner F9300 at $1,393.60; Polaris 9300 Sport Pool Cleaner F9300 is $35.40 less. Dolphin Liberty 400 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 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 Liberty 400 | 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 | Not listed | Not listed |
| 3-year warranty | Yes | Not listed |
| No recharging between cycles | No | YesEdge |
| 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 Liberty 400 stands out
Dolphin Liberty 400 is the better fit for owners who value cordless handling more than automatic scheduling and continuous power.
- 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.
- Runs from continuous plug-in power without a recharge between cycles
- Is listed $35.40 lower
Dolphin Liberty 400 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 Liberty 400 | Polaris 9300 Sport Pool Cleaner F9300 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 33 ft that need floor, wall and waterline cleaning without a cord. | Pools that need floor cleaning. |
| Starting price | $1,429 | $1,393.60 |
| Pool type | Inground, Above-ground | Not listed |
| Maximum pool length | Up to 33 ft | Not listed |
| Cleaning coverage | Floor, Walls, Waterline | Floor |
| Power | Cordless | Corded |
| Filtration | Basket, UltraFilter | Not listed |
| Scheduling | Weekly schedule + app | Daily schedule |
| App and remote | App control | Not listed |
| Cable | Cordless | 60 ft |
| Robot weight | 17.9 lb | 18 lb |
| Warranty | 3 years | Not listed |
Consider the stronger Pool Express option
Dolphin Liberty 400 and Polaris 9300 Sport Pool Cleaner F9300 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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