Help me choose
A stronger Pool Express option
Dolphin Active 30 and Dolphin Liberty 400 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 30
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.
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 30 or Dolphin Liberty 400: our take
Dolphin Active 30 and Dolphin Liberty 400 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 30 is intended for inground pools, while Dolphin Liberty 400 is intended for inground and above-ground pools. Dolphin Active 30 is rated for pools up to 50 ft; Dolphin Liberty 400 is rated up to 33 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin Active 30's documented cleaning system includes 1 active brush and CleverClean navigation.
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 30 provides a weekly timer, smartphone control, and included remote control; Dolphin Liberty 400 provides a weekly timer and smartphone control. Dolphin Active 30 uses a 60 ft corded cable with an anti-tangle swivel, while Dolphin Liberty 400 uses cordless battery power.
Price, warranty and the decision
Dolphin Active 30 is listed at $1,499 and Dolphin Liberty 400 at $1,429; Dolphin Liberty 400 is $70 less. Dolphin Active 30 lists a 2-year warranty compared with 3 years for Dolphin Liberty 400. Dolphin Active 30 and Dolphin Liberty 400 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 30 | Dolphin Liberty 400 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | Yes | Yes |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Yes | Yes |
| Smartphone app | Yes | Yes |
| Anti-tangle swivel | Yes | Not listed |
| 3-year warranty | No | YesEdge |
| 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 30 stands out
Dolphin Active 30 is the better fit for pools up to 50 ft.
- Is rated for pools up to 50 ft
- Runs from continuous plug-in power without a recharge between cycles
Where Dolphin Liberty 400 stands out
Dolphin Liberty 400 is the better fit for shoppers prioritizing the lower $1,429 starting price.
- Carries a 3-year warranty instead of 2 years
- Is listed $70 lower
Dolphin Active 30 vs Dolphin Liberty 400 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 30 | Dolphin Liberty 400 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. | Inground and above-ground pools up to 33 ft that need floor, wall and waterline cleaning without a cord. |
| Starting price | $1,499 | $1,429 |
| Pool type | Inground | Inground, Above-ground |
| Maximum pool length | Up to 50 ft | Up to 33 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Corded | Cordless |
| Filtration | Basket, UltraFilter | Basket, UltraFilter |
| Scheduling | Weekly schedule + app | Weekly schedule + app |
| App and remote | App + included remote | App control |
| Cable | 60 ft with anti-tangle swivel | Cordless |
| Robot weight | Not listed | 17.9 lb |
| Warranty | 2 years | 3 years |
Consider the stronger Pool Express option
Dolphin Active 30 and Dolphin Liberty 400 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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