Help me choose
A stronger Pool Express option
Dolphin Active 20 and Dolphin Liberty 300 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.
Active
Dolphin Active 20
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Liberty
Dolphin Liberty 300
Inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord.
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 Active 20 or Dolphin Liberty 300: our take
Dolphin Active 20 and Dolphin Liberty 300 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 Active 20 is intended for inground pools, while Dolphin Liberty 300 is intended for inground and above-ground pools. Dolphin Active 20 has a published maximum pool length of 50 ft; the other model does not have a verified length in our source material. Dolphin Active 20 cleans floor, walls, and waterline; Dolphin Liberty 300 cleans floor and walls. Dolphin Active 20 lists 1 active brush. Dolphin Liberty 300 lists Dual DC motors.
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 Active 20 provides a weekly timer and power-supply controls; Dolphin Liberty 300 provides no fully published timer, app or remote specification. Dolphin Active 20 uses a 60 ft corded cable with an anti-tangle swivel, while Dolphin Liberty 300 uses cordless battery power.
Price, warranty and the decision
Dolphin Active 20 is listed at $1,119 and Dolphin Liberty 300 at $1,099; Dolphin Liberty 300 is $20 less. Each lists a 2-year manufacturer warranty. Dolphin Active 20 and Dolphin Liberty 300 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 Active 20 | Dolphin Liberty 300 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | YesEdge | No |
| Fine-debris filter included | Yes | Yes |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Yes | Not listed |
| Smartphone app | No | Not listed |
| Anti-tangle swivel | Yes | Not listed |
| 3-year warranty | No | No |
| No recharging between cycles | YesEdge | No |
| 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 Active 20 stands out
Dolphin Active 20 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
- Runs from continuous plug-in power without a recharge between cycles
Where Dolphin Liberty 300 stands out
Dolphin Liberty 300 is the better fit for shoppers prioritizing the lower $1,099 starting price.
- Is listed $20 lower
- Cleans floor and walls
Dolphin Active 20 vs Dolphin Liberty 300 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 Active 20 | Dolphin Liberty 300 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. | Inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord. |
| Starting price | $1,119 | $1,099 |
| Pool type | Inground | Inground, Above-ground |
| Maximum pool length | Up to 50 ft | Not listed |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls |
| Power | Corded | Cordless |
| Filtration | Basket, UltraFilter | Basket, UltraFilter |
| Scheduling | Weekly schedule | Not listed |
| App and remote | Power-supply controls | Not listed |
| Cable | 60 ft with anti-tangle swivel | Cordless |
| Robot weight | Not listed | Not listed |
| Warranty | 2 years | 2 years |
Consider the stronger Pool Express option
Dolphin Active 20 and Dolphin Liberty 300 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.
More robotic pool cleaner comparisons
Keep comparing without rebuilding the same specification table yourself.
Clear UV vs Clear S
Pool Express pick: Clear UV
Dolphin Quantum vs Clear S
Pool Express pick: Dolphin Quantum
Dolphin Premier vs Dolphin Sigma
Pool Express pick: Dolphin Premier
Dolphin Premier vs Dolphin Quantum
Pool Express pick: Dolphin Quantum
Dolphin Sigma vs Dolphin Quantum
Pool Express pick: Dolphin Quantum
Dolphin Cayman vs Dolphin Escape
Pool Express pick: Dolphin Cayman