Chasing Hydro 4 SE vs Seauto Shark
Researched by Riley Hart · prices checked Nov 4, 2026
As of Nov 4, 2026, the Chasing Hydro 4 SE costs $449 and the Seauto Shark costs $399, so the Seauto Shark is $50 cheaper. Pick the Chasing Hydro 4 SE for medium pools where a cord is not a problem. Pick the Seauto Shark for budget buyers wanting long runtime. The Seauto Shark wins 2 of 3 points we can measure (1 tied).
Who wins, point by point
The Seauto Shark wins 2 of 3 points we can measure (1 tied). Built from today's prices, the specs and independent tests for these two robots.
| Hydro 4 SE | Shark | Winner | |
|---|---|---|---|
| Price today | $449 | $399 | Shark |
| Runtime | 3 h | 4 h | Shark |
| Warranty | 2 years | 2 years | Tie |
- Best for medium pools where a cord is not a problem
- You want to spend less (saves $50)
- You care most about runtime (4 h vs 3 h)
- Best for budget buyers wanting long runtime
- Cleans
- Floor
- Power
- Corded AC
- Runtime
- Auto cycles of 1
- Max pool
- Up to 1,614 sq ft
Corded pool robot with a 40 ft cable and 3 hour auto cycles
Full Chasing Hydro 4 SE review, pros and cons →- Cleans
- Floor
- Power
- Cordless
- Runtime
- 3 to 4 h by mode
- Max pool
- Up to 2,150 sq ft
Low cost cordless robot with 10,400 mAh battery
Full Seauto Shark review, pros and cons →Side by side
| Chasing Hydro 4 SE | Seauto Shark | |
|---|---|---|
| Price | $449 | $399 |
| 3 year cost | $449 | $399 |
| Our score | Not scored yet | Not scored yet |
| Rank in Pool | #20 | #19 |
| Status | on sale | on sale |
| Warranty | 2 years | n/a |
| Pool types | In ground and above ground, 1.6 to 9.8 ft deep; salt up to 5,000 ppm (Chasing and RobotShop) | Above-ground and in-ground; cement, vinyl liner, mosaic; all shapes (Seauto); depth 1.6 to 9.8 ft (Pro Tool Reviews spec sheet) |
| Cleans | Floor, walls and waterline (Chasing says) | Floor, wall and waterline, with floor, wall, waterline and all modes (Seauto) |
| Power | Corded AC, 150 W peak, 39.4 ft (12 m) cable per the spec table; box contents say 40 ft (Chasing) | Cordless, 10,400 mAh lithium battery (Seauto); 216 W brushless motor (Pro Tool Reviews) |
| Runtime | Auto cycles of 1, 2 or 3 h; wall only 2 h; floor only 2 h; Ultra Clean 3 h (Chasing says) | 3 to 4 h by mode (Seauto); PCWorld ran floor only for over 3 h; Pro Tool Reviews saw about 5 h total |
| Charge time | None needed, corded | 4.5 h (Seauto store); spec sheet in Pro Tool Reviews says 2 to 2.5 h, and the reviewer measured 2 to 3 h |
| Filter | 180 micron dual zone basket, 4.1 L; optional 50 micron basket (Chasing says) | 180 µm fine cartridge (Seauto) plus an optional high filtration basket and foam for floor only mode (PCWorld) |
| Max pool size | Up to 1,614 sq ft (Chasing says) | Up to 2,150 sq ft (Seauto) |
| App | Chasing app with scheduled start; no underwater control (Chasing comparison table); Happy TechFam found Bluetooth drops once submerged | Bluetooth and app control (Seauto); PCWorld says Wi-Fi is 2.4 GHz only; both reviews found the app buggy |
| Weight | 14.3 lb, 6.5 kg robot plus 2.9 lb control box (Chasing says) | 19 to 20 lb (Seauto) |
| Warranty | 2 years (Chasing store) | Not stated on the store page; Pro Tool Reviews reported a 2 year replacement warranty |
| Best for | medium pools where a cord is not a problem | budget buyers wanting long runtime |
| Skip if | you want app control while it is underwater | you need a reliable app |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
Chasing Hydro 4 SE
- Happy TechFam (blog): Hands on long term use. Picked up large leaves, twigs, sand and silt, and walls and waterline looked clean. Path did not always follow the S pattern, some areas got covered twice, auto docking was not always reliable, and corners and steps needed occasional brushing. Bluetooth dropped underwater. Site earns Amazon affiliate fees. Source
- Greattips3s (blog): Claims two weeks of daily use in an 18 by 36 ft gunite pool with about 1 h 45 min cycles and under 3 kWh total power use. No byline, several unsourced and conflicting figures, and affiliate links, so treat it as weak evidence. Source
Seauto Shark
- PCWorld: Picked up about 85% of organic debris and over 90% of artificial leaves in a 3+ hour floor only run, scrubbed the tile line well, and docked at the wall every time. The app was buggy and a firmware update never completed. Source
- Pro Tool Reviews: In a 20,000 gallon in-ground pool it ran more than 3 h in floor only mode, about 5 h total, recharged in 2 to 3 h, crossed raised drain covers and cleaned in a linear pattern. The app kept disconnecting. Source
Questions buyers ask
Which is better, the Chasing Hydro 4 SE or the Seauto Shark?
Pick the Chasing Hydro 4 SE for medium pools where a cord is not a problem. Pick the Seauto Shark for budget buyers wanting long runtime.
Which is cheaper?
The Seauto Shark at $399, versus $449 for the Chasing Hydro 4 SE, checked Nov 4, 2026.
What is the difference between the Hydro 4 SE and the Shark?
Pool types: In ground and above ground, 1.6 to 9.8 ft deep; salt up to 5,000 ppm (Chasing and… on the Hydro 4 SE, Above-ground and in-ground; cement, vinyl liner, mosaic; all shapes (Seauto); depth 1.6… on the Shark. Cleans: Floor, walls and waterline (Chasing says) on the Hydro 4 SE, Floor, wall and waterline, with floor, wall, waterline and all modes (Seauto) on the Shark. Power: Corded AC, 150 W peak, 39.4 ft (12 m) cable per the spec table; box contents say 40 ft… on the Hydro 4 SE, Cordless, 10,400 mAh lithium battery (Seauto); 216 W brushless motor (Pro Tool Reviews) on the Shark.
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