Help me choose
A stronger Pool Express option
Dolphin Liberty 200 and Dolphin Proteus DX5i 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 200
Inground and above-ground pools that need floor and wall cleaning, without a power cord.
Proteus
Dolphin Proteus DX5i
Inground pools up to 50 ft that need floor, wall and waterline 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 200 or Dolphin Proteus DX5i: our take
Dolphin Liberty 200 and Dolphin Proteus DX5i 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 200 is intended for inground and above-ground pools, while Dolphin Proteus DX5i is intended for inground pools. Dolphin Proteus DX5i has a published maximum pool length of 50 ft; the other model does not have a verified length in our source material. Dolphin Liberty 200 cleans floor and walls; Dolphin Proteus DX5i cleans floor, walls, and waterline. Dolphin Liberty 200 lists Dual DC motors. Dolphin Proteus DX5i lists 1 active brush.
Filtration and debris
Both models include Basket.
Controls and day-to-day ownership
Dolphin Liberty 200 provides no fully published timer, app or remote specification; Dolphin Proteus DX5i provides smartphone control. Dolphin Liberty 200 uses cordless battery power, while Dolphin Proteus DX5i uses a 60 ft corded cable with an anti-tangle swivel.
Price, warranty and the decision
Dolphin Liberty 200 is listed at $999 and Dolphin Proteus DX5i at $1,299; Dolphin Liberty 200 is $300 less. Each lists a 2-year manufacturer warranty. Dolphin Liberty 200 and Dolphin Proteus DX5i 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 200 | Dolphin Proteus DX5i |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | YesEdge |
| Fine-debris filter included | No | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Not listed | Not listed |
| Smartphone app | Not listed | Yes |
| Anti-tangle swivel | Not listed | Yes |
| 3-year warranty | No | No |
| 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 200 stands out
Dolphin Liberty 200 is the better fit for shoppers prioritizing the lower $999 starting price.
- Is listed $300 lower
- Cleans floor and walls
Where Dolphin Proteus DX5i stands out
Dolphin Proteus DX5i is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Has documented smartphone control
- Runs from continuous plug-in power without a recharge between cycles
Dolphin Liberty 200 vs Dolphin Proteus DX5i 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 200 | Dolphin Proteus DX5i |
|---|---|---|
| Best fit | Inground and above-ground pools that need floor and wall cleaning, without a power cord. | Inground pools up to 50 ft that need floor, wall and waterline cleaning. |
| Starting price | $999 | $1,299 |
| Pool type | Inground, Above-ground | Inground |
| Maximum pool length | Not listed | Up to 50 ft |
| Cleaning coverage | Floor, Walls | Floor, Walls, Waterline |
| Power | Cordless | Corded |
| Filtration | Basket | Basket |
| Scheduling | Not listed | Not listed |
| App and remote | Not listed | App control |
| Cable | Cordless | 60 ft with anti-tangle swivel |
| Robot weight | Not listed | Not listed |
| Warranty | 2 years | 2 years |
Consider the stronger Pool Express option
Dolphin Liberty 200 and Dolphin Proteus DX5i 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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