Dolphin S50

Dolphin S50 Robotic Pool Cleaner Review

Best Price
The Dolphin S50 Robotic Pool Cleaner has the following:
  • Plug'n'Play - Just plug it in, drop into the pool, for a hassle free clean
  • Easy Access Filter - Top-load filter access for easy and convenient debris removal and cleaning
  • Super Scrub - Intense scrubbing-power of pool surfaces, providing thorough cleaning
  • Energy Saver - Reduces water, chemical, and energy usage with every pool cleaning
  • CleverClean - Smart scanning and advanced navigation for complete pool coverage
  • Dolphin S50 Poolside
  • Dolphin S50 Poolside 2
  • Dolphin S50 Poolside 3
  • Dolphin S50 Underwater 4
  • Dolphin S50 Poolside With People 5
  • Dolphin S50 Poolside Cleaning Robot Open Filter 6
  • Dolphin S50 Poolside Cleaning Robot 7


Waterline Cleaning Bad No Waterline Cleaning
NanoFiltration Bad Not Available
Pool Coverage Bad Low
User Experience Good Average
No Restocking Fee Bad Sellers May Charge 20%+ Restocking Fee
30 Day Trial Avaliable Bad No Free Trial
Warranty Good 2 Year Warranty
Check mark Highs

Energy Efficient Motors

X icon Lows

No Swivel - Cord can get tangled

No Smartphone App

Lacks multiple filter options

No Weekly Timer - Can't schedule Cleanings

Shorter Warranty Than Premium Robots

Dolphin S50 Review

Dolpin’s S Series of robotic pool cleaners have long set the standard for affordable-yet-quality robotic pool cleaners. The “performance” grade model of their S Series, the S50, is the lowest costing cleaner with only a few of the additional features of its leveled-up models. Designed to clean above ground pools, we wanted to see how it performed in the unique challenges of an above ground pool environment. We judged the S50 on its reliability, cleaning efficiency, and ease of use. Keep reading to see how this robotic pool cleaner stood up to the scrutiny of our veteran pool owners.

Uncomplicated and User Friendly

The Dolphin S50 comes packaged ready to work upon opening. Its plug-and-play design makes it easy to get it going – just plug it in to the power supply and drop it into the water.

While the other S series models come with a lot of unique features, the S50 is very simple. The power supply has only one button, which starts and stops one standard cleaning cycle of 1.5 hours. There’s no need to sync your phone to any controls or figure out automation. While some users may dislike the lack of customizability with so few operating features, there is something to be said for its simplicity. And with one button, it’s impossible to get lost in the user interface of the power supply.

A Go-Getter in the Water

The S50 went to work quickly and purposefully when we dropped it to the bottom of our 30-foot above ground test pool. There were already pieces of larger debris both floating on the surface of the water and laying on the bottom of the pool. The S50 steadily moved in a regular pattern across the floor, sucking up all of the visible bits of leaves, sticks, and settled dirt.

We were impressed to see it clearly scrub the floor of the pool as well. As the S50 passed with each strip of cleaning, the color it left behind was significantly brighter than the uncleaned surface area next to it. If you look at the S50 closely out of the water, you’ll see the durable blue roller brush with tough bristles. These spin actively throughout the entire cleaning job at two times the rate of normal robotic pool cleaners. The S50 actually scrubs the surfaces it covers as opposed to a less efficient vacuum-like graze to grab only larger debris.

Many of the more affordable above ground pool cleaners we have tested have no scanning software. This means they wander aimlessly in the pool and can’t be trusted not to miss certain areas or linger too much in others. At this price point, we were surprised to find the S50 did have Dolphin’s patented CleverClean technology. This software does advanced scanning of the pool to ensure complete coverage during every job. With CleverClean, the S50 doesn’t miss even an inch of the pool’s floor surface area during its cleaning.

The S50 is designed to clean the bottom of an above ground pool only. Unlike some of the other S Series models, it wasn’t built to climb walls and scrub the water line. However, the model we received did climb past the corners and up the sides of the pool a bit, which was a nice surprise.

The above ground pool we tested the S50 in has a maximum width of 30 feet, which is all the S50 is designed to cover. So keep in mind that if you challenge it to a larger pool, it may miss some debris. After a 1.5 hour cleaning job with no hiccups, the S50 appeared to capture all of the visible debris we started with. On top of that, the floor of the pool was a brighter color, which we weren’t expecting.

Filter Findings

Dolphin is known for its easy-clean filtration, and the S50 is no exception. It is fitted with a top-loading filter basket that is very easy to remove. All you have to do is press a button, which makes the top of the robot pop up. Pull the filter cartridge handle up and dump out any of the larger debris the S50 caught. Our test run showed more debris than we anticipated in the filter cartridge. We used a hose to rinse out the smaller bits until the entire filter and cartridge were clean and bright white again.

The filter itself was not drastically dirty. While the filter cartridge gathered a lot of larger debris, we thought we might see evidence of finer particles like dirt and algae in the fine basket filter. Dolphin offers ultra-fine filter options, but this doesn’t come standard with the S50. The ultra-fine filter is excellent for intense deep cleanings of pool water, grabbing the sediment and algae that isn’t visible to the naked eye. If you’re concerned about highly filtered and the absolute purest pool water, it might be worth upgrading to the ultra-fine filter option.

Even with the standard top-loading cartridge and fine filter basket, the S50 sucked up all of the pool’s visible debris and obviously scrubbed its surfaces well. So the ultra-fine filter isn’t a deal breaker by any means.

Breezy Maintenance

The filtration system works well, and it’s also incredibly simple to maintain. Like we mentioned before, all it takes is rinsing the filtration basket with a hose until clean, then pop it back in to the S50. Easy as that.

The Dolphin S50 weighs only 13.8 pounds. As far as robotic pool cleaners go, that’s light. It’s easy to carry and doesn’t strain your back as you drop it into the water, lift it out, or carry it back to its storage spot. The handle is conveniently placed so you can easily grab it from the water, too. If you want to spring for a caddy you can, but the S50 is light enough for everyday handling.

Power cords can often be a headache with robotic pool cleaners. Fortunately, the Dolphin S50’s cable is 40 feet long, which is shorter than most and designed to avoid tangling. It doesn’t have Dolphin’s patented anti-swivel device that is found on higher end models, but that’s to be expected with a more basic design like the S50. Prevent any tangled messes by making sure you unkink the cord between cleanings to keep it straight and uncoiled before wrapping it up for storage.

From an ownership perspective, the S50 is advantageously energy efficient. Dolphin estimates it costs a mere 5 cents per hour to run the S50, so it won’t add on to your electric bill in the warmer months. The S50 comes with a two-year limited warranty, which is a vote of confidence for this bot’s durability. The warranty isn’t restricted to the number of hours or cycles you use it, either.

The Bread and Butter of Robotic Pool Cleaners

In terms of reliability and efficiency for above ground pools, the Dolphin S50 robotic pool cleaner can’t be beat. It is efficient at its cleaning jobs and utilizes its CleverClean technology to scan the pool so it doesn’t overlook any spots. You can operate it seamlessly with the push of the one and only button, and it is designed last for the long haul.

It may not have all of the bells and whistles of other robotic pool cleaners on the market, but it isn’t hindered at all by its simplicity. For the price, it’s not bad. You’ll have a hard time finding a comparable robot that can tackle an above ground pool as thoroughly as the S50 does. Its power and simplicity are the perfect combination, making it a solid choice for any small to medium-sized above ground pool.

Compare to higher rated robots

Dolphin Sigma Robotic Pool Cleaner

Dolphin Sigma Pool Cleaner

Dolphin Premier Robotic Pool Cleaner

Dolphin Premier Pool Cleaner

Best Price


Check mark Highs

Dolphin's Best Pool Robot Yet - More Features, More Filters, & More Power.

Most Advanced Dolphin Ever - Utilizes Gyroscope

Includes NanoFilters - Unlock a Deeper Clean

Quad Scrubbing Brushes - 4X Cleaning Power

Utilizes 3 Dolphin ProLine Commercial-Grade Motors

Best Price


Check mark Highs

Only Dolphin with a Leaf Bag - includes Multi-Media

Waterline Cleaning Beast

New, High Performing Dolphin ProLine Model

NanoFiltration - Premier's NanoFilters allow it to clean deeper than standard Dolphin pool robots

3 Year Warranty

Dolphin S50
Robot Class: Above Ground


Energy Saver

Ultra Efficient

Save hundreds of dollars a year while cleaning your pool!

Dolphin S50 saves hundreds of dollars a year in energy when compared to pressure-side or suction-side cleaners.

Plug and Play

Plug and Play

Simply Plug Dolphin S50 in and start cleaning!

Set up has never been easier. No installation needed. Dolphin S50 is ready to go right out of the box. No extra pumps, plumbing, or anything else needed. Simply plug S50 and start cleaning!

Smart Navigation

Precise Navigation

Powered by CleverClean™ Technology

CleverClean™ coverage is powered by an advanced navigation system. This technology ensures that the most effecient route is used to clean your pool floor. So smart, the system automatically navigates around obstacles and quickly returns to its route.


Pool & Shop

Where To Buy

Seller Buy From Availability Shop Online
In-Store Exclusive $699 Similar Robots

The Dolphin S50 is only sold in-stores. Robots that are sold in-stores only are often overpriced when compared to their online counterparts. Usually marked up $100-300 more and with a shorter warranty, you may want to consider an alternative robot.

Looking for the best deal on the Dolphin S50 and other robotic pool cleaners? Look no further, we have you covered. We searched the web and found the best deals on Maytronics, Aquabot, Polaris, and other cleaners.

Customer Reviews

S50 Robotic Icon
3 stars 3.1 Based on Reviews

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Question & Answers

Why won't this cleaner climb the walls?

The above ground robotic pool cleaners are designed specifically for cleaning the FLOORS ONLY.

What is the typical life span of a Dolphin robot?

The Dolphin is designed to last many seasons. However, the lifespan differs from Dolphin to Dolphin. Many different factors play a role, such as amount of use, pool chemistry, and pool surface.

What DIY repairs can I complete on my Dolphin?

DIY repairs should be completed by an authorized technician. Please contact your local retailer for service, Maytronics directly at 1-888-365-7446 or the support page of our website.

What are the voltage requirements for the Dolphin power supply?

The Dolphin requires a standard 120v outlet for power.

Pool Attributes


Pool Types Above Ground
Pool Size 30 ft
Pool Shape Rectangle, Oval, or Freeform
Obstacles Steps, Ladder, Drain Cover, Ledges, Pop-Ups
Surface Gunite, Fiberglass, Vinyl, Liner
Waterline Cleaning No
Number of Filters Included 1
Filter Cleaning Top Access
Cleaning Coverage Floor
Cleaning Cycle(s) 1.5 hrs
Number of Brushes 1
Connectivity & Automation
Remote operation No
WiFi / Bluetooth WiFi: No
Bluetooth: No
Smartphone App No
Automated Weekly Timer No
Full Bag Indicator No
Cable Length 40 ft
Anti-Tangling Swivel No
Restocking Fee No
Warranty 2 Years
Caddy Included Optional Caddies Available
Official Website
Official Dolphin Premier Comparison Page Dolphin S50 vs Dolphin Premier
Official Dolphin Sigma Comparison Page Dolphin S50 vs Dolphin Sigma
Part Number 99996131-USF

Dolphin S50
Robot Class: Above Ground


Terra Premium Caddy

Terra Caddy

The Must-Have Dolphin Accessory

Weather and UV-Resistant. Terra Caddy is the go-to Dolphin Caddy. Sealed and protected, the Terra Caddy is covered in a protect resin that cures to an extremely hard layer, making it resistant to scratches and weathering. The resin cures very hard, making it solvent-resistant and scratch-resistant. This level of protection makes the Terra Caddy stand up to rain, sunshine, termites, and more.

Dolphin Universal Caddy

Dolphin Caddy

Move and Store

A robotic pool cleaner is an investment, so make sure to protect it. The Dolphin Universal Caddy is a solid caddy that gets the job done. Easily store and transport your robotic pool cleaner to keep it lasting for years to come.

Dolphin Robotic Pool Cleaner Replacement Parts

Replacement Parts

Need extra filters, replacement power supply, or new climbing rings?

Looking for Dolphin S50 replacement parts? Well, you've come to the right place. Shop all replacement parts for the Dolphin S50 and all other Dolphin models.

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