Dolphin S300 versus Dolphin Quantum

Compare Features, Filters, and Warranty

Dolphin S300
Dolphin Quantum Pro Line Pool Robot

Dolphin S300


Dolphin Quantum

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yes S300 includes

yes Quantum includes

Full floor, wall, and waterline coverageUltimate Coverage - Full floor, wall, and waterline coverage
Ultra-fine Filter and Standard Filter NanoFilters™ and Standard Filter Included
Programmable Weekly Timer - Schedule cleanings every 24, 48, 72 hrs Programmable Weekly Timer - Schedule cleanings every 24, 48, 72 hrs
Anti-Tangle Swivel - Patented 360 Degree Rotation Anti-Tangle Swivel - Patented 360 Degree Rotation
PowerJet 3D Mobility - Laterally move across the waterline with powerful vortex jets
Largest NanoFilter Ever - Over 400 square inch Filter Basket

yes S300 does not include

yes Quantum does not include

In-Store Exclusive - Not Available Online



Dolphin S300

Ultra-Fine Filters yes  
Standard Filter yes  
Wall Climbing yes  
Waterline Cleaning yes  
Programmable Timer yes  
Cable Swivel yes  
PowerJet 3D Mobility yes  

Dolphin Quantum

NanoFilters™ yes  
Standard Filter yes  
Wall Climbing yes  
Waterline Cleaning yes  
Programmable Timer yes  
Cable Swivel yes  
PowerJet 3D Mobility yes  

Head To Head Review Analysis

Comparing the Dolphin S300 to the Dolphin Quantum

The Dolphin Quantum and Dolphin S300 both clean your pool's floor, walls, and waterline. Breaking down their filters, the Dolphin Quantum® includes 2 filter options for its oversized basket: NanoFilters and Standard Filter. The Dolphin S300 also includes 2 filter options: Standard and Ultra-Fine Filters.

Dolphin Quantum Waterline
Ultimate Pool Coverage of the pool floor, walls, and waterline

Filter Options

NanoFilters™ are the newest innovation out of the Dolphin ProLine™. These filters help capture microscopic particles that pass through the standard filters.

Dolphin Quantum Multi-Media®
Quantum's NanoFilter™ - Our Largest Ever.

Engineers equipped the Quantum with the largest NanoFilter ever. At over 400 square inches of space, the NanoFilter provides advanced filtration to stop the most difficult of particulate, including bacteria, algae, oil, leaves, and more.

The Dolphin Quantum includes:

  • Oversized NanoFilter Basket (Our Largest NanoFilter Ever)
  • Standard Cartridge Filter Basket

The Dolphin S300 includes:

  • Standard Cartridge Filter
  • Ultra-Fine Cartridge Filter

Unlock Your Robot’s Full Potential

There are two types of filters available on modern robotic pool cleaners. The first-generation robots will have a filter consisting of a large pore plastic mesh. The second-generation type is the NanoFilter™ cartridge, which is a high-efficiency particulate filter. The large pore mesh filter is the more basic type and is found on many discount pool cleaners, while the Nanofilter is the more advanced option. Under a microscope, you can see the Nanofilter’s individual fibers intersecting to create a tight mesh. This webbed structure is able to sieve even the smallest of micron particles. Additionally, the filter’s deep pleats provide a larger surface area, meaning more waterborne particles can be trapped while having relatively low resistance to waterflow.

Dolphin Quantum Multi-Media®
NanoFilter™ vs Standard Filter

The NanoFilter™ also has the benefit of being able to absorb oil, which is beneficial for keeping sunscreen and scum lines from forming on the pool’s surface. Overall, the pleated Nanofilter is more efficient than the plastic mesh filter at capturing all types of microscopic waterborne particles, including pollen, algae, bacteria, pet dander, and other debris. Not only does this improve the amount of contaminants that are removed from the water, but it also leads to a higher level of clarity and sparkle in the pool. The Nanofilter serves as an important booster to the pool’s main filter, and for this reason, it is the preferred choice for many pool owners.

The NanoFilters™ capture more dirt, sand, and even oil out of your pool than the standard filter cartridges, making a NanoFilter™ a must-have for any pool robot. Without it, these particles will be left inside of your pool and can lead to poor water chemistry.

Ease of Use

Both robots have a similar setup process and weigh about the same. To set up either one, simply plug the power supply into an outdoor outlet, plug the unit into the power supply, drop the unit into the water, and press start. Both robots have a weekly timer with options for daily, every other day, and every three-day cycles.

Cleaning Performance

In terms of cleaning performance, the Dolphin Quantum® is capable of cleaning pool floors, walls, and waterline (also called the scum line), which is the most vulnerable part of the pool to dirt, grime, and algae buildup. This is especially important for robotic pool cleaners because if the bot doesn't clean the scum line, you'll still need to manually brush the pool afterwards. The Dolphin S300 also covers your entire pool, including the pool floor, walls, and waterline.

Dolphin Quantum Oversized Leaf Bag
Powered by SmartNav 2.0

Anti-Tangle Swivel

Both models come with an anti-tangle swivel to minimize cord tangling. This helps both robots clean with power and precision in your swimming pool. The Patented Tangle Free Swivel from Maytronics allows the robot to rotate 360 degrees without your cord getting tangled.

Where To Buy

Dolphin S300

Not Available Online

Shop Online Models


Dolphin S300 Dolphin Quantum

Part Number 99996221-USWI 99996203-SPLSW
Waterline Cleaning Yes Yes
Multi-Media No Yes
# of Filters Included: Ultra-Fine Filter Kit 2
Filter Cleaning Top Access Fine and Ultra-fine Oversized Filter Basket
Cleaning Coverage Floor, Walls and Waterline Floor, Walls, Waterline
Cleaning Cycle 2 hours 1.5 hours
Number of Brushes 2 2
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, Ladder, Drain Cover, Ledges, Pop-Ups
Surface Gunite, Fiberglass, Vinyl, Liner Concrete, Plaster, Gunite, Pebble, Tile, Vinyl Liner, Fiberglass
Media-Alert No No
Automated Weekly Timer Yes Yes
Remote operation No No
Restocking Fee No
Warranty 2 Years 2 Years
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