Polaris ERA 710
#26 in CordedFull review
A budget corded Polaris for smaller in-ground pools.
Walmart $599$599
The Polaris ERA 710 and the Dolphin Premium 20 are evenly matched, rated 3.2 and 3.2. The Polaris ERA 710 costs $30.10 less ($599 vs $629.10).
Dolphin Premium 20
#28 in CordedFull review
A floor-and-wall Dolphin for pools up to 33 ft.
Leslie's $629.10$629.10
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.
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 | Polaris ERA 710 | Dolphin Premium 20 |
|---|---|---|
| Overall rating | 3.2/5 | 3.2/5 |
| Value 25% | 62 $599 | 60 $629 |
| Cleaning 25% | 60 Floor and walls | 60 Floor and walls |
| Navigation 15% | 50 navigation not published (neutral score used) | 50 Smart scanning |
| Warranty 15% | 50 warranty not published (neutral score used) | 50 2-year warranty |
| Pool size 10% | 39 pools up to 36 ft long (about 650 sq ft) | 27 pools up to 33 ft long (about 540 sq ft) |
| Features 10% | 0 0 of 4; no app control, scheduling, swivel cable, caddy | 0 0 of 3; no app control, scheduling, swivel cable |
Specifications
| Polaris ERA 710 | Dolphin Premium 20 | |
|---|---|---|
| Pool | ||
| Pool size (rated) | Up to 36 ft long | Up to 33 ft long |
| Pool types | In-ground | In-ground and above-ground |
| Cleaning | ||
| Cleans | Floor and walls | Floor and walls |
| Surface skimming | No | No |
| Filter | 3 L canister | Fine Filter Kit, top access |
| Filter capacity | 3 L | - |
| Water flow | - | 4,000 gal/h |
| Power | ||
| Power | Corded, 50 ft cable | Corded |
| Run time | Longest cycle 2 h 30 min | Longest cycle 2 h |
| Swivel cable | No | No |
| Navigation & app | ||
| Navigation | - | Smart scanning |
| App | No | No |
| Scheduling | No | No |
| Retrieval | Tap & Lift: tap with a pole and it climbs to the waterline | - |
| Caddy included | No | - |
| Build | ||
| Weight | - | 14.6 lb (6.6 kg) |
| Warranty | - | 2 years |