Help me choose
A stronger Pool Express option
Dolphin Liberty 400 and Dolphin Liberty 600 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.
Liberty
Dolphin Liberty 600
Inground and above-ground pools up to 50 ft that need floor, wall, waterline and lounge-area 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 Liberty 400 or Dolphin Liberty 600: our take
Dolphin Liberty 400 and Dolphin Liberty 600 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
Both robots are intended for inground and above-ground pools. Dolphin Liberty 400 is rated for pools up to 33 ft; Dolphin Liberty 600 is rated up to 50 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them.
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
Both models provide a weekly timer and smartphone control. Both use cordless battery power. Dolphin Liberty 400 is listed at 17.9 lb versus 25.8 lb for Dolphin Liberty 600; that 7.900000000000002 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Liberty 400 is listed at $1,429 and Dolphin Liberty 600 at $1,729; Dolphin Liberty 400 is $300 less. Each lists a 3-year manufacturer warranty. Dolphin Liberty 400 and Dolphin Liberty 600 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 | Dolphin Liberty 600 |
|---|---|---|
| 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 | Not listed | Not listed |
| 3-year warranty | Yes | Yes |
| No recharging between cycles | No | 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 Liberty 400 stands out
Dolphin Liberty 400 is the better fit for shoppers prioritizing the lower $1,429 starting price.
- Is listed $300 lower
- Weighs 17.9 lb versus 25.8 lb
Where Dolphin Liberty 600 stands out
Dolphin Liberty 600 is the better fit for pools up to 50 ft.
- Is rated for pools up to 50 ft
- Cleans floor, walls, waterline and lounge areas
Dolphin Liberty 400 vs Dolphin Liberty 600 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 | Dolphin Liberty 600 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 33 ft that need floor, wall and waterline cleaning without a cord. | Inground and above-ground pools up to 50 ft that need floor, wall, waterline and lounge-area cleaning without a cord. |
| Starting price | $1,429 | $1,729 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 33 ft | Up to 50 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Cordless | Cordless |
| Filtration | Basket, UltraFilter | Basket, UltraFilter |
| Scheduling | Weekly schedule + app | Weekly schedule + app |
| App and remote | App control | App control |
| Cable | Cordless | Cordless |
| Robot weight | 17.9 lb | 25.8 lb |
| Warranty | 3 years | 3 years |
Consider the stronger Pool Express option
Dolphin Liberty 400 and Dolphin Liberty 600 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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