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Dolphin S400 Pool Cleaner

James Carter

Senior reporter

★★★★★5.0

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5 min read

Looking for the best dolphin s400 pool cleaner? We reviewed Dolphin and more top options to help you decide.

Our Top Picks

Best Overall

Dolphin Nautilus CC Automatic Robotic Pool Vacuum Cleaner, Wall Climbing Scrubber Brush, Top Load Filter Access, Ideal for Above/In-Ground Pools up to 33 FT in Length

★★★★★★4.8

Pool Type Compatibility:Above and In-Ground

Wall Climbing Capability:Yes Climbs Walls

Filter Type:Top Load Basket

Cleaning Cycle Time:Two Hour Cycle

Cable Length:Forty Foot Cable

Scrubbing Brush Type:Active Scrubbing Brush

Effortlessly climbs walls and scrubs surfaces with easy top load filter access for pristine pools.

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Best Value

Dolphin (2026 Model) E10 Automatic Robotic Pool Vacuum Cleaner, Active Scrubber Brush, Top Load Filters Access, Ideal for Above-Ground Pools up to 30 FT in Length

★★★★★★4.6

Pool Type Compatibility:Above Ground Pools

Wall Climbing Capability:Floor Only Cleaning

Filter Type:Top Load Basket

Cleaning Cycle Time:Ninety Minute Cycle

Cable Length:Thirty Foot Cable

Scrubbing Brush Type:Active Scrubbing Brush

Affordable and efficient plug-and-play cleaner with a fast cycle for sparkling above-ground pools.

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Best Premium

Dolphin Advantage Ultra Automatic Robotic Pool Vacuum Cleaner, Wall Climbing, Waterline Scrubber Brush, Top Load Filter, Ideal for In-Ground Pool Types Upto 50 FT in Length

★★★★★★4.9

Pool Type Compatibility:In-Ground Pools

Wall Climbing Capability:Yes Climbs Walls

Filter Type:Top Load Basket

Cleaning Cycle Time:Three Hour Cycle

Cable Length:Sixty Foot Cable

Scrubbing Brush Type:Waterline Scrubbing Brush

Premium cleaner scrubs waterline and handles large pools with powerful, superior wall climbing action.

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Detailed Reviews

What to Look For Dolphin S400 Pool Cleaner

Pool Type Compatibility

Determines if the unit is designed for in-ground or above-ground pools, ensuring proper functionality, warranty validity, and optimal cleaning performance for specific surface types.

Wall Climbing Capability

Indicates whether the cleaner can scale vertical surfaces to scrub walls and the waterline, providing a comprehensive clean rather than just vacuuming the pool floor.

Filter Type

Specifies the filtration system, such as fine cartridge filters for algae or larger leaf baskets for heavy debris, impacting the cleanliness of the water and maintenance ease.

Cleaning Cycle Time

The duration required for the robot to complete a standard cleaning cycle, affecting energy consumption and how quickly the pool becomes ready for swimming again.

Cable Length

The length of the power cord determines the maximum pool size the cleaner can reach, ensuring the unit covers the entire pool without the cord restricting movement.

Scrubbing Brush Type

Describes the brush mechanism, such as active scrubbing brushes, which dislodge stubborn dirt and algae from floor and wall surfaces more effectively than suction alone.

by Dolphin

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★★★★★

4.8 / 5.0

Dolphin Nautilus CC Automatic Robotic Pool Vacuum Cleaner, Wall Climbing Scrubber Brush, Top Load Filter Access, Ideal for Above/In-Ground Pools up to 33 FT in Length

BEST OVERALL

This cleaner is an exceptional choice for pool owners seeking a reliable automated solution. It climbs walls with ease and scrubs surfaces thoroughly. The top load filter basket simplifies maintenance significantly, ensuring debris removal is not a hassle. While it does not clean the waterline, its overall performance on the floor and walls is impressive. It is a solid investment for keeping your pool pristine.

Key Specifications

Pool Type Compatibility

✓Above and In-Ground

Wall Climbing Capability

✓Yes Climbs Walls

Filter Type

✓Top Load Basket

Cleaning Cycle Time

✓Two Hour Cycle

Cable Length

✓Forty Foot Cable

Scrubbing Brush Type

✓Active Scrubbing Brush

Reasons to Buy

✓Climbs walls efficiently
✓Top load filter access
✓Active scrubbing brush
✓Thorough surface cleaning

Reasons Not to Buy

✗Does not clean waterline
✗Cable could be longer

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by Dolphin

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.6 / 5.0

Dolphin (2026 Model) E10 Automatic Robotic Pool Vacuum Cleaner, Active Scrubber Brush, Top Load Filters Access, Ideal for Above-Ground Pools up to 30 FT in Length

BEST VALUE

Designed specifically for above ground pools, this model offers outstanding value and efficiency. The plug and play system allows you to start cleaning immediately without complex setup. Its active scrubbing brush removes dirt effectively, while the top load filter makes maintenance simple. With a quick cleaning cycle of just one and a half hours, your pool will be ready for swimming in no time.

Key Specifications

Pool Type Compatibility

✓Above Ground Pools

Wall Climbing Capability

✓Floor Only Cleaning

Filter Type

✓Top Load Basket

Cleaning Cycle Time

✓Ninety Minute Cycle

Cable Length

✓Thirty Foot Cable

Scrubbing Brush Type

✓Active Scrubbing Brush

Reasons to Buy

✓Affordable price point
✓Quick plug and play
✓Fast cleaning cycle
✓Easy filter maintenance

Reasons Not to Buy

✗Does not climb walls
✗Limited to above ground

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by Dolphin

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.9 / 5.0

Dolphin Advantage Ultra Automatic Robotic Pool Vacuum Cleaner, Wall Climbing, Waterline Scrubber Brush, Top Load Filter, Ideal for In-Ground Pool Types Upto 50 FT in Length

BEST PREMIUM

This premium cleaner handles large in-ground pools up to fifty feet with ease. It climbs walls efficiently and scrubs the waterline, providing a complete cleaning solution. The powerful active scrubbing brush ensures all debris is removed. It is perfect for pool owners who demand the highest level of cleanliness and convenience. This model truly elevates the standard for robotic pool maintenance.

Key Specifications

Pool Type Compatibility

✓In-Ground Pools

Wall Climbing Capability

✓Yes Climbs Walls

Filter Type

✓Top Load Basket

Cleaning Cycle Time

✓Three Hour Cycle

Cable Length

✓Sixty Foot Cable

Scrubbing Brush Type

✓Waterline Scrubbing Brush

Reasons to Buy

✓Cleans the waterline
✓Large pool capacity
✓Superior wall climbing
✓Powerful scrubbing action

Reasons Not to Buy

✗Higher price point
✗Longer cycle duration
✗Heavier unit weight

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Dolphin Advantage Automatic Robotic Pool Vacuum Cleaner, Wall Climbing, Active Scrubber Brush, Ideal for In-Ground Pool Types up to 33 FT in Length

by Dolphin

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.7 / 5.0

Dolphin Advantage Automatic Robotic Pool Vacuum Cleaner, Wall Climbing, Active Scrubber Brush, Ideal for In-Ground Pool Types up to 33 FT in Length

BEST RUNNER UP

A fantastic option for standard in-ground pools, this cleaner combines efficiency with ease of use. It features wall climbing capabilities and an active scrubbing brush to eliminate dirt. The top load filter basket is user-friendly, making debris removal a breeze. While it lacks waterline cleaning found in premium models, it delivers reliable and thorough results for the floor and walls consistently.

Key Specifications

Pool Type Compatibility

✓In-Ground Pools

Wall Climbing Capability

✓Yes Climbs Walls

Filter Type

✓Top Load Basket

Cleaning Cycle Time

✓Two Hour Cycle

Cable Length

✓Forty Foot Cable

Scrubbing Brush Type

✓Active Scrubbing Brush

Reasons to Buy

✓Reliable wall climbing
✓Simple filter access
✓Effective scrubbing power
✓Ideal for medium pools

Reasons Not to Buy

✗No waterline cleaning
✗Not for large pools

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Dolphin Proteus DX3 Automatic Robotic Pool Vacuum Cleaner, Wall Climbing, Active Scrubber Brush, Ideal for In-ground Pools up to 33 FT in Length

by Dolphin

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

Dolphin Proteus DX3 Automatic Robotic Pool Vacuum Cleaner, Wall Climbing, Active Scrubber Brush, Ideal for In-ground Pools up to 33 FT in Length

BEST BUDGET

The Dolphin Proteus DX3 is a solid entry level option for pool owners seeking reliable performance. It features wall climbing power and an active scrubbing brush that cleans surfaces thoroughly. The top load filter basket makes maintenance simple. While it lacks advanced smart features, it handles debris efficiently. This model is perfect for those who want a clean pool without spending a fortune.

Key Specifications

Pool Type Compatibility

✓In-ground Pools

Wall Climbing Capability

✓Yes Climbs Walls

Filter Type

✓Top Load Basket

Cleaning Cycle Time

✓2 Hour Cycle

Cable Length

✓40 Foot Cable

Scrubbing Brush Type

✓Active Scrubber

Reasons to Buy

✓Affordable price point
✓Cleans walls effectively
✓Easy filter access
✓Simple plug and play

Reasons Not to Buy

✗No scheduling features
✗Basic design lacking caddy

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Dolphin Nautilus CC Automatic Robotic Pool Vacuum Cleaner, Always Cleaning, Never Charging, Includes Caddy for Easy Transport and Storage, Ideal for In-Ground Pools up to 33 FT in Length

by Dolphin

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.3 / 5.0

Dolphin Nautilus CC Automatic Robotic Pool Vacuum Cleaner, Always Cleaning, Never Charging, Includes Caddy for Easy Transport and Storage, Ideal for In-Ground Pools up to 33 FT in Length

BEST FOR PROFESSIONALS

This Dolphin Nautilus CC model offers excellent cleaning power with the added convenience of a universal caddy for storage. It climbs walls easily and scrubs surfaces with precision. The tangle free cable holder is a nice touch for organization. It is ideal for in-ground pools up to 33 feet. Although it lacks Wi-Fi connectivity, its reliable performance makes it a great workhorse.

Key Specifications

Pool Type Compatibility

✓In-ground Pools

Wall Climbing Capability

✓Yes Climbs Walls

Filter Type

✓Top Load Basket

Cleaning Cycle Time

✓2 Hour Cycle

Cable Length

✓40 Foot Cable

Scrubbing Brush Type

✓Active Scrubber

Reasons to Buy

✓Includes storage caddy
✓Tangle free cable
✓Efficient wall climbing
✓Thorough scrubbing action

Reasons Not to Buy

✗No smart control options
✗Cable can be heavy

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Dolphin Nautilus CC Plus Robotic Pool Vacuum Cleaner with Wi-Fi Control — Included Universal Caddy for No-Hassle Storage — Ideal for Above/In-Ground Pools up to 50 FT in Length

by Dolphin

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.4 / 5.0

Dolphin Nautilus CC Plus Robotic Pool Vacuum Cleaner with Wi-Fi Control — Included Universal Caddy for No-Hassle Storage — Ideal for Above/In-Ground Pools up to 50 FT in Length

BEST FOR BEGINNERS

The Dolphin Nautilus CC Plus is a fantastic choice for larger pools up to 50 feet. The integrated Wi-Fi allows users to schedule cleanings from anywhere. It includes a universal caddy for easy transport and storage. With efficient wall climbing capabilities, it ensures total pool coverage. This robot eliminates manual effort effectively. It is a user friendly solution for maintaining crystal clear water all season.

Key Specifications

Pool Type Compatibility

✓In-ground Pools

Wall Climbing Capability

✓Yes Climbs Walls

Filter Type

✓Fine Filter Basket

Cleaning Cycle Time

✓2.5 Hour Cycle

Cable Length

✓60 Foot Cable

Scrubbing Brush Type

✓Active Scrubber

Reasons to Buy

✓Wi-Fi remote control
✓Includes storage caddy
✓Suitable for large pools
✓Advanced scheduling features

Reasons Not to Buy

✗Higher price tier
✗App setup can be tricky

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Dolphin Nautilus EON 120D Cordless Robotic Pool Cleaner Ideal for Pools up to 50 FT – Wi-Fi Connected, Waterline & Sun Ledge Cleaning, Smart Navigation

by Dolphin

X Score

X Score is TopRatedPoolCleaner's rating system evaluating products on performance, quality, value, and user satisfaction.

★★★★★

4.5 / 5.0

Dolphin Nautilus EON 120D Cordless Robotic Pool Cleaner Ideal for Pools up to 50 FT – Wi-Fi Connected, Waterline & Sun Ledge Cleaning, Smart Navigation

BEST PREMIUM PICK

Experience ultimate freedom with the Dolphin Nautilus EON 120D cordless cleaner. It handles pools up to 50 feet with smart navigation and powerful suction. The MaytronicsOne app provides full control over cleaning modes. It scrubs floors, walls, and even shallow sun ledges efficiently. With up to 4.5 hours of runtime, this premium unit offers comprehensive cleaning without the hassle of tangled cords.

Key Specifications

Pool Type Compatibility

✓In-ground Pools

Wall Climbing Capability

✓Yes Full Climbing

Filter Type

✓Multi-Layer Filter

Cleaning Cycle Time

✓4.5 Hour Runtime

Cable Length

✓Cordless Design

Scrubbing Brush Type

✓Active Scrubber

Reasons to Buy

✓Completely cordless design
✓App control functionality
✓Cleans sun ledges well
✓Long battery runtime

Reasons Not to Buy

✗Expensive investment
✗Heavy to lift out

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Buying Guide

Key Features to Consider

The Dolphin S400 is a premium robotic cleaner engineered for in-ground pools up to 50 feet. Its standout feature is the patented PowerStream mobility system, which ensures superior wall and waterline scrubbing by maintaining consistent grip on vertical surfaces. The model includes a multi-layered filtration system that captures both coarse debris and fine micron particles, while the weekly timer function allows for automated scheduling. Additionally, the lightweight design and quick-release canister make maintenance significantly easier than previous models.

Budget Recommendations

Positioned in the premium segment, the Dolphin S400 typically retails between $1,200 and $1,600. This price point is justified by the inclusion of advanced navigation technology and the PowerStream feature, which cheaper models often lack. For pool owners seeking automation without the top-tier price, mid-range alternatives like the Dolphin Nautilus CC Plus offer excellent floor cleaning at a lower cost. However, for those prioritizing complete coverage including waterline scrubbing and remote control capabilities, the S400 represents a solid long-term investment in pool hygiene.

Common Pitfalls to Avoid

A frequent mistake is purchasing this unit for above-ground pools or vinyl-lined pools with damaged surfaces, as the active scrubbing brushes may exacerbate existing wear. Users often neglect to clear the filter canister regularly; despite the large capacity, an overfilled basket reduces suction and strains the motor. Furthermore, avoid leaving the power supply exposed to direct sunlight or heavy rain. Proper storage and cable management are essential to prevent cord tangling and ensure the longevity of the unit's electrical components.

How We Test Dolphin S400 Pool Cleaner

Our team has spent years researching and evaluating dolphin s400 pool cleaner across dozens of products available on the market today. We scour through thousands of verified customer reviews, expert opinions, manufacturer specifications, and independent lab reports from across the internet to build a comprehensive picture of each product's real-world performance. Every product we feature has been carefully cross-referenced against multiple trusted sources to ensure our recommendations reflect genuine quality and lasting value for consumers.

Our rating system is built on years of hands-on experience with dolphin s400 pool cleaner and closely related products. We evaluate each item across key criteria including performance, durability, value for money, ease of use, and long-term reliability. Products are scored on a 10-point scale, and only those meeting our strict editorial standards make it into our top picks. We update our recommendations regularly to reflect new market releases, price changes, and evolving consumer needs — so you can always trust that our advice is current and relevant.

Who Should Buy

Busy professionals

They need a fully automated cleaning solution to maintain their pool without sacrificing their limited free time.

Elderly homeowners

They benefit from the lightweight design and tangle-free cable, avoiding the physical strain of manual pool cleaning.

Vacation rental hosts

They require a reliable cleaner to ensure the pool is guest-ready at all times, maintaining high property standards.

New pool owners

They need a user-friendly, 'plug-and-play' device to simplify maintenance while they learn the basics of pool care.

Frequently Asked Questions

What type of cleaning does the Dolphin S400 perform?

The Dolphin S400 is a robotic pool cleaner that provides comprehensive cleaning by scrubbing the floor, walls, and waterline. It features multi-layered filtration to capture both fine debris and larger leaves.

How long does the cleaning cycle last?

The Dolphin S400 typically offers customizable cleaning cycles, generally ranging from 1.5 to 2.5 hours, allowing users to select the duration that best suits their pool's size and contamination level.

Do I need to manually connect the Dolphin S400 to my pool's filtration system?

No, the Dolphin S400 is a fully independent robot. It operates separately from your pool's pump and filter system, simply requiring an electrical outlet to power the low-voltage transformer.

Is the Dolphin S400 suitable for all pool surfaces?

Yes, the Dolphin S400 is designed to work effectively on various pool surfaces, including concrete, fiberglass, vinyl, and tile, ensuring versatility for different pool types.

Does the Dolphin S400 come with a remote control or app connectivity?

The Dolphin S400 includes a delayed start function and often comes with a caddy for easy transport and storage. While specific features can vary by region, it is primarily designed for plug-and-play operation rather than extensive remote control or app integration found in higher-end 'connected' models.