Polaris 9550 Sport
#5 in CordedFull review
A heavy-duty corded Polaris for large in-ground pools, if you can find it from a reliable seller.
Walmart $999$999
The Polaris 9550 Sport and the Dolphin Proteus DX5i are evenly matched, rated 3.7 and 3.7. The Polaris 9550 Sport costs $200 less ($999 vs $1,199).
Dolphin Proteus DX5i
#10 in CordedFull review
A Wi-Fi full-coverage robot for large pools, essentially Leslie’s counterpart to the Nautilus CC Pro with a longer warranty.
Leslie's $1,199$1,199
Prices were last checked October 24, 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 9550 Sport | Dolphin Proteus DX5i |
|---|---|---|
| Overall rating | 3.7/5 | 3.7/5 |
| Value 25% | 40 $999 | 32 $1,199 |
| Cleaning 25% | 85 Floor, walls and waterline | 85 Floor, walls and waterline |
| Navigation 15% | 50 Sensor-based | 50 Smart scanning |
| Warranty 15% | 50 2-year warranty | 50 2-year warranty |
| Pool size 10% | 100 pools up to 60 ft long (about 1,800 sq ft) | 100 pools up to 50 ft long (about 1,250 sq ft) |
| Features 10% | 75 3 of 4; no app control | 75 3 of 4; no caddy |
Specifications
| Polaris 9550 Sport | Dolphin Proteus DX5i | |
|---|---|---|
| Pool | ||
| Pool size (rated) | Up to 60 ft long | Up to 50 ft long |
| Pool types | In-ground | In-ground and above-ground |
| Surfaces | All in-ground pool surfaces | - |
| Cleaning | ||
| Cleans | Floor, walls and waterline | Floor, walls and waterline |
| Surface skimming | No | No |
| Filter | 5 L canister with dirty-canister indicator | Fine Filter Kit, top access |
| Filter capacity | 5 L | - |
| Water flow | - | 4,000 gal/h |
| Power | ||
| Power | Corded, 70 ft cable | Corded, 59 ft cable |
| Run time | - | Longest cycle 2 h |
| Swivel cable | Yes | Yes |
| Navigation & app | ||
| Navigation | Sensor-based | Smart scanning |
| App | No | Yes |
| Connectivity | - | Wi-Fi |
| Scheduling | Yes | Yes |
| Retrieval | Easy Lift System | - |
| Caddy included | Yes | No |
| Build | ||
| Weight | - | 17.4 lb (7.9 kg) |
| Warranty | 2 years | 2 years |
| Released | 2014-08 | 2022-05 |