Dolphin Premium 20
#28 in CordedFull review
A floor-and-wall Dolphin for pools up to 33 ft.
Leslie's $629.10$629.10
The Dolphin Premium 20 is the better robotic pool cleaner overall, rated 3.2 to 3.0. The Dolphin Premium 20 leads on cleaning. The Polaris P70 wins on value. The Polaris P70 costs $130.10 less ($499 vs $629.10).
Polaris P70
#35 in CordedFull review
A basic floor cleaner for above-ground and simple flat-bottom pools.
Leslie's $499 Walmart $499$499
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Dolphin Premium 20 for cleaning (Floor and walls vs Floor only).
- Choose the Polaris P70 for value ($499 vs $629).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every corded robotic pool cleaner; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dolphin Premium 20 | Polaris P70 |
|---|---|---|
| Overall rating | 3.2/5 | 3.0/5 |
| Value 25% | 60 $629 | 70 $499 |
| Cleaning 25% | 60 Floor and walls | 20 Floor only |
| Navigation 15% | 50 Smart scanning | 50 navigation not published (neutral score used) |
| Warranty 15% | 50 2-year warranty | 50 2-year warranty |
| Pool size 10% | 27 pools up to 33 ft long (about 540 sq ft) | 50 pool size not published (neutral score used) |
| Features 10% | 0 0 of 3; no app control, scheduling, swivel cable | 0 0 of 4; no app control, scheduling, swivel cable, caddy |
Specifications
| Dolphin Premium 20 | Polaris P70 | |
|---|---|---|
| Pool | ||
| Pool size (rated) | Up to 33 ft long | - |
| Pool types | In-ground and above-ground | Above-ground |
| Cleaning | ||
| Cleans | Floor and walls | Floor only |
| Surface skimming | No | No |
| Filter | Fine Filter Kit, top access | 3 L canister, transparent lid |
| Filter capacity | - | 3 L |
| Water flow | 4,000 gal/h | - |
| Power | ||
| Power | Corded | Corded, 40 ft cable |
| Run time | Longest cycle 2 h | - |
| Swivel cable | No | No |
| Navigation & app | ||
| Navigation | Smart scanning | - |
| App | No | No |
| Scheduling | No | No |
| Caddy included | - | No |
| Build | ||
| Weight | 14.6 lb (6.6 kg) | - |
| Warranty | 2 years | 2 years |