Dolphin Sigma versus Dolphin Liberty 300
Compare Features, Filters, and Warranty
Liberty 300 or Sigma. Which wins?
Diving into the Liberty 300 vs Sigma, our pool experts distinguish the key features you'll want to look for when choosing a pool robot. That way, you can decide between the Dolphin Sigma or Dolphin Liberty 300.
Sigma's top features...
Includes a Gyroscope
The Most Advanced Robot Ever - Sigma's gyroscopic sensors allow Sigma to clean deeper than any robot before.
Cleans the Waterline
The Dolphin Sigma cleans your entire pool - including the floor, wall, and waterline.
Why Waterline Cleaning is Needed →
Includes NanoFilters™
The included Gen 2 NanoFilters capture smaller debris other cleaners miss.
Why NanoFilters are essential →Liberty 300 is missing...
Missing Weekly Timer
Without a timer, the Dolphin Liberty 300 won't automatically run every day. This is an essential feature you'll need, unless you want to manually turn on the robot everyday.
No Waterline Cleaning
Without waterline cleaning, the Dolphin Liberty 300 won't clean the dirtest part of your pool. The Liberty 300 only has partial wall climbing.
Why Waterline Cleaning is Needed →
No NanoFilters™
Without these Gen 2 filters, the Liberty 300 cannot clean smaller particles, such as algae, sand, and other debris.
Why NanoFilters are essential →Compare essential features...
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|---|---|---|
 |
Sigma | Liberty 300 |
| Cleans Waterline | Yes | No |
| NanoFiltration | Yes | No |
| MultiMedia | No |
No |
Leaf Bag | No |
No |
Dual Stabilizer | Yes | No |
Gyroscope | Yes | No |
3 Year Warranty | Yes | No |
| No Restocking Fee | Yes | Yes |
| 30 Day Trial | Yes | Yes |
| Shop Now | Buy | Buy |
Shoppers also looked at... Compare Vs.
Dolphin Premier
Premier adds waterline cleaning, commercial grade motors, MultiMedia™, NanoFilters™, 3 year warranty + 30 Day Free Trial.
Dolphin Quantum
Features waterline cleaning, smart weekly timer, MaxBin™, NanoFilters™, and a 2 year warranty.
Key Differences - Why Sigma Wins
Sigma
- Includes NanoFilters™ - Captures small debris other cleaners miss
- Waterline Cleaning - Cleans the pool floor, wall, & waterline
- Triple Commercial Grade Motors - 3 ProLine Motors filter 4500 GPH+
- myDolphin Plus App - Schedule and clean the Sigma from anywhere
- Gyroscope - Gyroscopic sensors control and monitor every movement
- 3 Year Warranty - Longest warranty available
Liberty 300
- No Waterline Cleaning - Won't clean the dirtest part of your pool
- Cordless Model - Decent solution if no power near pool, but fails in other areas
- Short Batterly Life - Must be recharged after every 1.5hr cycle
- No Timer Capability - It cannot be set to run daily automatically like other Dolphins
Compare Dolphin Sigma vs Dolphin Liberty 300
| Features | Sigma | Liberty 300 |
|---|---|---|
| Standard Filter |  |
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| NanoFilters™ | |
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| Wall Climbing | |
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| Waterline Cleaning | |
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| Programmable Timer | |
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| Gyroscope | |
|
| Dual Stabilizer | |
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| Anti-Tangle Swivel | |
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| 3 Year Warranty | |
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Compare Features
NanoFilters™
Often overlooked, having a NanoFilter™ can be the most important part of a pool robot. Without it, small microscopic particulate will pass right through the standard filters found on most robots. These highly advanced filters capture more debris than any other filter on the market, leaving you with a cleaner, happier, and healthier pool.
The Dolphin Sigma includes NanoFilters™
The Dolphin Liberty 300 does not include NanoFilters™
Standard Fine Filter
These standard filters help capture larger items such as small leaves and other debris, while maximizing flow rate. However, if your pool struggles with cloudy pool water, small algae, or sand. You many want to consider a unit with NanoFilters™.
The Dolphin Sigma includes a standard filter.
The Dolphin Liberty 300 includes a standard filter.
Programmable Weekly Timer
An automatic pool cleaner should be automatic, right? With a programmable weekly timer, you can set the robot to clean at different intervals. So your pool robot can clean for you everyday of the week while you sit back and relax - without the need to manually turn it on and off everyday.
The Dolphin Sigma includes a weekly timer.
The Dolphin Liberty 300 does not include a weekly timer.
Dual Stabilizer
This essential piece to waterline cleaning allows the unit to cling to the walls of your pool - allowing a more precise and deeper clean at the waterline. Units with dual stabilizers have increased performance and agility while cleaning. It also doubles as an easy handle to pickup your robot from.
The Dolphin Sigma includes a dual stabilizer.
The Dolphin Liberty 300 does not include a dual stabilizer.
Anti-Tangle Cable Swivel
Say goodbye to pesky tangled cords. An anti-tangle swivel allows the robot to move 360 degrees around your pool without the cord getting tangled. So you can sit back and enjoy while your pool robot vacuums and cleans for you.
The Dolphin Sigma includes an anti-tangle swivel.
The Dolphin Liberty 300 does not include an anti-tangle swivel.
3 Year Warranty
A robot is only as important as its warranty. By purchasing through an Authorized Maytronics Dealer such as Poolbots, you'll get the full warranty on all robotic pool cleaners available on Poolbots.com. Try any robotic pool cleaner risk-free for 30 days in your pool without any restocking fees.
The Dolphin Sigma includes a 3 year warranty.
The Dolphin Liberty 300 includes a 2 year warranty.
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Compare Specifications
|
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| Part Number | 99991036-SPLI | 99998150-US |
|---|---|---|
| ASIN | B07CZ1XVZX | |
| Waterline Cleaning | Yes | No |
| Multi-Media® | No | No |
| # of Filters Included: | 2 | 1 |
| Filter Cleaning | Ultra-fine NanoFilters and Standard Filter Cartridge sets | Filter Basket |
| Cleaning Coverage | Floor, Walls, Waterline | Floor and Walls |
| Cleaning Cycle | 2.5 hours | 1.5 hours |
| Number of Brushes | 4 | 1 |
| Cable Length | 60 ft | No Cable |
| Anti-Tangle Swivel | Yes | No |
| Pool Types | In Ground | In Ground & Above 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 | Concrete, Plaster, Gunite, Pebble, Tile, Vinyl Liner, Fiberglass | Concrete, Plaster, Gunite, Pebble, Tile, Vinyl Liner, Fiberglass |
| Media-Alert® | No | No |
| Automated Weekly Timer | Yes | No |
| Remote operation | Yes - Through App | No |
| Restocking Fee | No |
No |
| Warranty | 3 Years | 2 Years |
| Read Reviews | Dolphin Sigma Review | Dolphin Liberty 300 Review |
View Other Top Comparisons
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Read Our Reviews
Learn more about the Dolphin Sigma and Dolphin Liberty 300 in our reviews. Our in-depth pool robot reviews are written by our pool experts and will help you make an informed decision when purchasing a robotic pool cleaner for your pool. Read the Dolphin Liberty 300 Review, Dolphin Sigma Review, or browser other top robotic pool cleaner reviews.
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WHAT'S NEXT?
Try in your own pool for 30 days.
Every pool deserves an intelligent robot. If you don't love it, simply return the robot. Unlike the other guys, we never charge a restocking fee or any other fees - meaning no restocking fee ever.
