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Free 1-2 Day Shipping. Low Price Guarantee. Easy Returns/Exchanges.

Choose from top models from the top brands.

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...

Dolphin Gyroscope

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 →
Dolphin NanoFilter Cartridges

Includes NanoFilters™

The included Gen 2 NanoFilters capture smaller debris other cleaners miss.

Why NanoFilters are essential →

Liberty 300 is missing...

Dolphin Timer

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 →
Dolphin NanoFilter Cartridges

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...

Dolphin ProLine Dolphin Max-Series
Dolphin Logo Sigma Liberty 300
Cleans Waterline Yes
No
Nano
Filtration
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 yes yes
NanoFilters™ yes no
Wall Climbing yes yes
Waterline Cleaning yes no
Programmable Timer yes no
Gyroscope yes no
Dual Stabilizer yes no
Anti-Tangle Swivel yes no
3 Year Warranty yes no

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.

NanoFilters™ capture fine dirt and debris that passes through the standard filters
yes
The Dolphin Sigma includes NanoFilters™
yes
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™.

NanoFilter™ vs Standard Filters
NanoFilter™ (left) vs Standard Filters (right)
yes
The Dolphin Sigma includes a standard filter.
yes
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.

yes
The Dolphin Sigma includes a weekly timer.
yes
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.

yes
The Dolphin Sigma includes a dual stabilizer.
yes
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.

yes
The Dolphin Sigma includes an anti-tangle swivel.
yes
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.

yes
The Dolphin Sigma includes a 3 year warranty.
yes
The Dolphin Liberty 300 includes a 2 year warranty.

All Videos

  • Top 3 Cleaners for 2023
  • Dolphin Sigma Review
  • Why You Need a Programmable Timer
  • Which Robotic Cleaner is Best For You?
  • Dolphin Premier vs Sigma
  • Open Box vs Refurbished Pool Robots
  • Waterline Cleaning: The Feature You Need
  • Why Hypergrip Tracks Are Necessary
  • A Gamechanger: Robotic Cleaners with a Gyroscope
  • Why You Need an Anti-Tangle Swivel
  • Pool Cleaning EasyRobotic Pool Cleaner
  • Don't Buy Without Waterline Cleaning
  • How To Clean Your Robot's Filters
  • The Importance of Waterline Cleaning
  • Why You Need Stabilizers
  • Dolphin Nautilus CC Supreme vs Sigma
  • Three Problems with the Nautilus CC Plus
  • Budget vs Premium Dolphin Robotic Cleaners
  • Dolphin's Commercial Motors
  • Pressure Side Cleaner vs Automatic Robotic Pool Cleaner
  • Aquabot Elite Pro vs Dolphin Sigma
  • Waterline Cleaning vs Wall Climbing
  • The Benefits of an Anti-Tangle Swivel
  • 6 Must Have Features

Compare Specifications

Dolphin Sigma Dolphin Liberty 300

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

Compare all of the top robotic pool cleaners from Maytronics' Dolphin, Aquabot, & More.

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.

WHAT'S NEXT?

Try any 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.

Pool Robot Buying Guide