Help me choose
A stronger Pool Express option
Dolphin T3000 and Niya Sonar 20 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
T-Line
Dolphin T3000
Inground and above-ground pools up to 50 ft with steps or a sun ledge that need full-coverage cleaning with scheduling and modes.
Niya Sonar
Niya Sonar 20
Above-ground pools up to 26 ft that need the floor cleaned without a cord.
What we recommend instead
Dolphin Cayman
Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
$1,079
Buy Dolphin CaymanDolphin T3000 or Niya Sonar 20: our take
Dolphin T3000 and Niya Sonar 20 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 T3000 is intended for inground and above-ground pools, while Niya Sonar 20 is intended for above-ground pools. Dolphin T3000 is rated for pools up to 50 ft; Niya Sonar 20 is rated up to 26 ft. Dolphin T3000 cleans floor, walls, and waterline; Niya Sonar 20 cleans floor. Dolphin T3000 lists 2 active brushes and CleverClean navigation. Niya Sonar 20 lists Sonar navigation and Dual drive motors.
Filtration and debris
Dolphin T3000 includes Basket and UltraFilter; Niya Sonar 20 includes Basket. That gives Dolphin T3000 the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin T3000 provides a weekly timer and smartphone control; Niya Sonar 20 provides one-touch starts and power-supply controls. Dolphin T3000 uses continuous corded power, while Niya Sonar 20 uses cordless battery power. Dolphin T3000 is listed at 17.9 lb versus 10 lb for Niya Sonar 20; that 7.899999999999999 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin T3000 is listed at $1,449 and Niya Sonar 20 at $199; Niya Sonar 20 is $1,250 less. Dolphin T3000 lists a 3-year warranty compared with 1 years for Niya Sonar 20. Dolphin T3000 and Niya Sonar 20 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
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 T3000 | Niya Sonar 20 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | YesEdge | No |
| Scrubs the waterline | YesEdge | No |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | YesEdge | No |
| Smartphone app | YesEdge | No |
| Anti-tangle swivel | Yes | Not listed |
| 3-year warranty | YesEdge | 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 T3000 stands out
Dolphin T3000 is the better fit for pools up to 50 ft.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Includes filtration for sand, pollen and other fine debris
- Can start on a weekly schedule without a manual launch before every cycle
- Adds smartphone control
Where Niya Sonar 20 stands out
Niya Sonar 20 is the better fit for shoppers prioritizing the lower $199 starting price.
- Is listed $1,250 lower
- Weighs 10 lb versus 17.9 lb
Dolphin T3000 vs Niya Sonar 20 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 T3000 | Niya Sonar 20 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 50 ft with steps or a sun ledge that need full-coverage cleaning with scheduling and modes. | Above-ground pools up to 26 ft that need the floor cleaned without a cord. |
| Starting price | $1,449 | $199 |
| Pool type | Inground, Above-ground | Above-ground |
| Maximum pool length | Up to 50 ft | Up to 26 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor |
| Power | Corded | Cordless |
| Filtration | Basket, UltraFilter | Basket |
| Scheduling | Weekly schedule + app | One-touch start |
| App and remote | App control | Power-supply controls |
| Cable | Not listed | Cordless |
| Robot weight | 17.9 lb | 10 lb |
| Warranty | 3 years | 1 years |
Consider the stronger Pool Express option
Dolphin T3000 and Niya Sonar 20 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
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