Head-to-Head Comparison
Dolphin Quantum vs Dolphin M400
Our pool experts compare features, filtration, specs, and value to help you pick the right robotic pool cleaner.
Dolphin Quantum
Dolphin M400 or Dolphin Quantum — which wins?
Our pick: the Dolphin Quantum
Diving into the Dolphin Quantum vs Dolphin M400, our pool experts weigh filtration, cleaning coverage, smart features, and value. For most pools, the Dolphin Quantum is the robot we recommend — and right now you save $250.
What Sets Them Apart
Key Differences
Quantum
- Includes NanoFilters™ - Captures small debris other cleaners miss
- MaxBin™ is larger and easier to clean than filter cartridges
- Waterline Cleaning - Cleans the pool floor, wall, & waterline
- Weekly Timer - Schedule the robot to automatically clean
- HyperBrush - Scrubs 2X the speed of standard Dolphin robots
- PowerJet 3D Mobility - Advanced propulsion jets power the Quantum along the waterline
M400
Side by Side
Feature Comparison
The features that matter most when comparing the Dolphin Quantum and Dolphin M400.
| Feature | QuantumOur Pick | M400 |
|---|---|---|
| Standard Filter | ||
| NanoFilters™ | ||
| Wall Climbing | ||
| Waterline Cleaning | ||
| Programmable Weekly Timer | ||
| Dual Stabilizer | ||
| Anti-Tangle Swivel | ||
| 3-Year Warranty |
Explained
Compare Features in Detail
NanoFilters™
Often overlooked, a NanoFilter™ can be the most important part of a pool robot. Without it, microscopic particulate — fine dust, pollen, and algae — passes right through the standard filters found on most robots. These ultra-fine filters trap that debris for a noticeably cleaner, healthier pool. Learn more ›
Programmable Weekly Timer
An automatic pool cleaner should be automatic. A programmable weekly timer sets the robot to clean on a schedule — every day, every other day, or a few times a week — without you turning it on and off.
Dual Stabilizer
Essential for waterline cleaning, dual stabilizers let the unit cling to the walls for a more precise, deeper clean at the waterline — with increased agility and an easy pickup handle.
Anti-Tangle Cable Swivel
Say goodbye to tangled cords. An anti-tangle swivel lets the robot move 360° around your pool without the cord getting tangled, so you can sit back while it cleans. Learn more ›
Warranty Coverage
A robot is only as good as its warranty. The Dolphin Quantum is backed by a 2-year warranty, while the Dolphin M400 carries a 3-year warranty. Buying through an Authorized Dealer like Poolbots gets you the full manufacturer warranty — never pro-rated or limited by cleaning cycles — plus a 30-day in-pool trial with no restocking fees. Learn more ›
Watch
Videos
See the Dolphin Quantum and Dolphin M400 in action.
The Details
Specifications
| Quantum | M400 | |
|---|---|---|
| Part Number | 99996203-SPLSW | 99991046-USI |
| Waterline Cleaning | Yes | Yes |
| Multi-Media® | No | No |
| Filters Included | 2 | Ultra-Fine Filter Kit |
| Filter Cleaning | NanoFilter Set, Standard Filter Set, & XXL MaxBin | Top Access |
| Cleaning Coverage | Floor, Walls, Waterline, Ledges, Steps | Floor, Walls and Waterline |
| Cleaning Cycle | 1.5, 2, 2.5 hours | 2.5 hours |
| Number of Brushes | 2 | 3 |
| Cable Length | 60 ft | 60 ft |
| Anti-Tangle Swivel | Yes | Yes |
| Pool Types | In Ground | In Ground |
| Maximum Pool Size | 50 ft | 50 ft |
| Pool Shape | Rectangle, Oval, or Freeform | Rectangle, Oval, or Freeform |
| Obstacles | Steps, Ladder, Drain Cover, Ledges, Pop-Ups, Steps, Ledges | Steps, Ladder, Drain Cover, Ledges, Pop-Ups |
| Surface | Concrete, Plaster, Gunite, Pebble, Tile, Vinyl Liner, Fiberglass | Gunite, Fiberglass, Vinyl, Liner |
| Media-Alert® | No | No |
| Automated Weekly Timer | Yes | Yes |
| Remote Operation | No | No |
| Restocking Fee | No | No |
| Warranty | 2 Years | 3 Years |
Go Deeper
Read Our Expert Reviews
Our in-depth reviews are written by pool experts to help you make an informed decision.
Dolphin Quantum
Read Dolphin Quantum ReviewDolphin M400
Read Dolphin M400 ReviewKeep Comparing
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What’s Next?
Still narrowing it down? These expert guides and tools make it easy to find the right pool robot for your pool — most ship free, same day.
Pool Robot Buying Guide
Everything to know before you buy your first robot.
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Robot Selector
Answer a few quick questions and get a recommendation.
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Videos
Watch reviews, comparisons, and expert how-tos.
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Pool Volume Calculator
Calculate your exact pool volume to find the right robot.
Read more →Try It in Your Own Pool for 30 Days
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