Help me choose
A stronger Pool Express option
Dolphin T25 and Niya Sonar 30 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.
T-Line
Dolphin T25
Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.
Niya Sonar
Niya Sonar 30
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 T25 or Niya Sonar 30: our take
Dolphin T25 and Niya Sonar 30 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. Both are rated for pools up to 33 ft. Dolphin T25 cleans floor and walls; Niya Sonar 30 cleans floor, walls, and waterline. Dolphin T25 lists 1 active brush. Niya Sonar 30 lists 2 active brushes, Sonar navigation, and Three brushless motors.
Filtration and debris
Dolphin T25 includes Basket and UltraFilter; Niya Sonar 30 includes Basket. That gives Dolphin T25 the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin T25 provides a weekly timer and power-supply controls; Niya Sonar 30 provides one-touch starts and power-supply controls. Dolphin T25 uses a 50 ft corded cable, while Niya Sonar 30 uses cordless battery power. Dolphin T25 is listed at 15 lb versus 19.2 lb for Niya Sonar 30; that 4.199999999999999 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin T25 is listed at $849 and Niya Sonar 30 at $379; Niya Sonar 30 is $470 less. Dolphin T25 lists a 2-year warranty compared with 1 years for Niya Sonar 30. Dolphin T25 and Niya Sonar 30 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 T25 | Niya Sonar 30 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | YesEdge |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | YesEdge | No |
| Smartphone app | No | No |
| Anti-tangle swivel | Not listed | 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 T25 stands out
Dolphin T25 is the better fit for inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.
- Includes filtration for sand, pollen and other fine debris
- Can start on a weekly schedule without a manual launch before every cycle
- Carries a 2-year warranty instead of 1 years
- Runs from continuous plug-in power without a recharge between cycles
Where Niya Sonar 30 stands out
Niya Sonar 30 is the better fit for shoppers prioritizing the lower $379 starting price.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Uses 2 active brushes instead of 1
- Is listed $470 lower
Dolphin T25 vs Niya Sonar 30 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 T25 | Niya Sonar 30 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 33 ft that need floor and wall 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 | $849 | $379 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 33 ft | Up to 33 ft |
| Cleaning coverage | Floor, Walls | Floor, Walls, Waterline |
| Power | Corded | Cordless |
| Filtration | Basket, UltraFilter | Basket |
| Scheduling | Weekly schedule | One-touch start |
| App and remote | Power-supply controls | Power-supply controls |
| Cable | 50 ft | Cordless |
| Robot weight | 15 lb | 19.2 lb |
| Warranty | 2 years | 1 years |
Consider the stronger Pool Express option
Dolphin T25 and Niya Sonar 30 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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