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Dolphin M400 Robotic Pool Cleaner

James Carter

Senior reporter

★★★★★5.0

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6 min read

Looking for the best dolphin m400 robotic 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

★★★★★★4.7

Pool Size Capacity:Up to 33 FT

Cleaning Coverage:Floor and Wall

Filter Type:Top Load Basket

Cycle Time:2 Hours Cycle

Cable Length:40 FT Cable

Weight:14 Pounds Weight

Delivers exceptional wall climbing and scrubbing power with easy top load filter maintenance.

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Best Value

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

★★★★★★4.8

Pool Size Capacity:Up to 50 FT

Cleaning Coverage:Wall and Floor

Filter Type:Top Load Basket

Cycle Time:2 Hours Cycle

Cable Length:60 FT Cable

Weight:15 Pounds Weight

Offers smart Wi-Fi control and included caddy for convenient, efficient pool cleaning.

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Best Premium

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 Size Capacity:Up to 30 FT

Cleaning Coverage:Floor Only Coverage

Filter Type:Top Load Basket

Cycle Time:1.5 Hours Cycle

Cable Length:30 FT Cable

Weight:12 Pounds Weight

Cleans above ground pools rapidly with a user-friendly design and active scrubbing brush.

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Detailed Reviews

What to Look For Dolphin M400 Robotic Pool Cleaner

Pool Size Capacity

Indicates the maximum pool length or volume the unit can effectively clean, ensuring the robot is powerful enough for your specific pool dimensions.

Cleaning Coverage

Specifies whether the robot cleans just the floor, coves, walls, or the waterline, determining how much manual brushing is still required.

Filter Type

Differentiates between ultra-fine cartridges for clarity and large leaf baskets for heavy debris, impacting maintenance ease and water polish quality.

Cycle Time

The duration of a standard cleaning cycle, affecting how quickly the pool becomes swim-ready and scheduling flexibility for the homeowner.

Cable Length

Determines the physical reach of the robot, ensuring it can navigate to the furthest point of the pool without the power cord restricting movement.

Weight

A critical factor for usability, as a lighter unit is significantly easier to lift in and out of the pool, reducing physical strain on the user.

by Dolphin

X Score

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★★★★★

4.7 / 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 makes maintenance simple and quick. Although it does not clean the waterline, its performance on floors and walls is impressive. This model offers outstanding cleaning power for pools up to thirty three feet.

Key Specifications

Pool Size Capacity

✓Up to 33 FT

Cleaning Coverage

✓Floor and Wall

Filter Type

✓Top Load Basket

Cycle Time

✓2 Hours Cycle

Cable Length

✓40 FT Cable

Weight

✓14 Pounds Weight

Reasons to Buy

✓Climbs walls efficiently
✓Active scrubbing brush
✓Top load filter access
✓Plug and play operation

Reasons Not to Buy

✗Does not clean waterline
✗No remote control

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by Dolphin

X Score

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

★★★★★

4.8 / 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 VALUE

The Nautilus CC Plus brings smart technology to your backyard with convenient Wi-Fi scheduling. It handles pools up to fifty feet efficiently. The included universal caddy solves storage issues and keeps the cable organized. It scrubs walls and floors effectively for a pristine look. This unit is perfect for users who want advanced features and excellent cleaning performance without a premium price.

Key Specifications

Pool Size Capacity

✓Up to 50 FT

Cleaning Coverage

✓Wall and Floor

Filter Type

✓Top Load Basket

Cycle Time

✓2 Hours Cycle

Cable Length

✓60 FT Cable

Weight

✓15 Pounds Weight

Reasons to Buy

✓Wi-Fi remote control
✓Includes storage caddy
✓Climbs walls efficiently
✓Scheduled cleaning options

Reasons Not to Buy

✗Higher price point
✗App connection occasionally drops

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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 PREMIUM

The Dolphin E10 is specifically designed for above ground pools up to thirty feet. Its active scrubbing brush removes debris with minimal effort required. The plug and play system is incredibly user friendly for beginners. You simply plug it in and drop it into the water. It delivers a spotless pool in just one point five hours, making it a top tier choice.

Key Specifications

Pool Size Capacity

✓Up to 30 FT

Cleaning Coverage

✓Floor Only Coverage

Filter Type

✓Top Load Basket

Cycle Time

✓1.5 Hours Cycle

Cable Length

✓30 FT Cable

Weight

✓12 Pounds Weight

Reasons to Buy

✓Fast cleaning cycle
✓Easy top filter access
✓Lightweight and compact
✓Active scrubbing brush

Reasons Not to Buy

✗Only for above ground
✗Does not climb walls

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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

by Dolphin

X Score

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

★★★★★

4.8 / 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 RUNNER UP

The Advantage Ultra provides a comprehensive clean for in ground pools up to fifty feet. It climbs walls and scrubs the waterline for total coverage. The active scrubbing brush is tough on debris but safe for surfaces. This model guarantees a sparkling pool with minimal manual intervention. It is an outstanding option for anyone needing a powerful cleaner that tackles every part of the pool.

Key Specifications

Pool Size Capacity

✓Up to 50 FT

Cleaning Coverage

✓Full Pool Coverage

Filter Type

✓Top Load Basket

Cycle Time

✓2.5 Hours Cycle

Cable Length

✓60 FT Cable

Weight

✓16 Pounds Weight

Reasons to Buy

✓Scrubs waterline effectively
✓Climbs walls efficiently
✓Large filter capacity
✓Thorough cleaning coverage

Reasons Not to Buy

✗Heavier than other models
✗Longer cycle time

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Dolphin Nautilus CC Supreme Wi-Fi Automatic Robotic Pool Vacuum Cleaner, Dual Drive, Waterline Scrubber Brush, Top Load Filter, Ideal for In-Ground Pools up to 50 FT

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 Supreme Wi-Fi Automatic Robotic Pool Vacuum Cleaner, Dual Drive, Waterline Scrubber Brush, Top Load Filter, Ideal for In-Ground Pools up to 50 FT

BEST PREMIUM PICK

This cleaner offers exceptional performance for large in-ground pools. The Wi-Fi connectivity allows users to schedule cleanings from anywhere, which adds convenience. Its dual drive technology ensures the unit navigates efficiently, while the waterline scrubber brush eliminates unsightly grime. The top load filter is easy to access, making maintenance simple. Although it is an investment, the active scrubbing power saves time and effort for pool owners.

Key Specifications

Pool Size Capacity

✓Up to 50 FT

Cleaning Coverage

✓Floor, Wall, Waterline

Filter Type

✓Top Load Basket

Cycle Time

✓2 Hour Cycle

Cable Length

✓60 Foot Cable

Weight

✓35 Pounds

Reasons to Buy

✓Always connected Wi-Fi
✓Excellent waterline scrubbing
✓Powerful active brush
✓Simple filter access

Reasons Not to Buy

✗Higher price point
✗Heavy to lift

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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 FOR PROFESSIONALS

The cordless design eliminates tangled wires, providing a hassle free cleaning experience. With advanced smart navigation, this unit covers floors, walls, and shallow sun ledges with precision. The MaytronicsOne app offers complete control over cleaning modes and scheduling. It boasts an impressive runtime to handle large pools. This model is perfect for those who desire freedom from cords and comprehensive pool coverage without manual intervention.

Key Specifications

Pool Size Capacity

✓Up to 50 FT

Cleaning Coverage

✓Floor, Wall, Ledge

Filter Type

✓Internal Mesh Basket

Cycle Time

✓4.5 Hour Runtime

Cable Length

✓No Cable Cordless

Weight

✓32 Pounds

Reasons to Buy

✓Completely cordless design
✓Cleans sun ledges
✓Advanced app control
✓Multiple cleaning modes

Reasons Not to Buy

✗Long charging time
✗Expensive investment

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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 BEGINNERS

This model is a fantastic choice for standard sized pools. The included universal caddy makes transport and storage effortless, keeping the cable organized. It climbs walls efficiently to ensure a thorough clean on various surfaces. The active scrubbing brush removes debris without damaging the pool finish. Users appreciate the simplicity of operation and reliable results. It is a solid, user friendly option that requires no complex setup.

Key Specifications

Pool Size Capacity

✓Up to 33 FT

Cleaning Coverage

✓Floor and Wall

Filter Type

✓Top Access Basket

Cycle Time

✓2 Hour Cycle

Cable Length

✓40 Foot Cable

Weight

✓22 Pounds

Reasons to Buy

✓Includes storage caddy
✓Efficient wall climbing
✓Easy to transport
✓Simple operation

Reasons Not to Buy

✗Limited to smaller pools
✗No smart features

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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.

★★★★★

4.3 / 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 BUDGET

The Dolphin Advantage delivers reliable cleaning power at an accessible price point. It features an active scrubber brush that tackles tough debris on the floor and walls. The wall climbing ability ensures comprehensive coverage for various pool shapes. With a user friendly top load filter basket, maintenance is quick and mess free. This unit is ideal for pool owners who want a clean pool without spending a fortune.

Key Specifications

Pool Size Capacity

✓Up to 33 FT

Cleaning Coverage

✓Floor and Wall

Filter Type

✓Top Load Filter

Cycle Time

✓2 Hour Cycle

Cable Length

✓40 Foot Cable

Weight

✓20 Pounds

Reasons to Buy

✓Great value price
✓Effective wall climbing
✓Easy filter care
✓Lightweight design

Reasons Not to Buy

✗Basic feature set
✗Shorter cable length

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Buying Guide

Key Features to Consider

The Dolphin M400 is distinguished by its advanced CleverClean navigation system, which utilizes state-of-the-art algorithms and an active brushing mechanism to ensure comprehensive coverage of the pool floor, walls, and waterline. Users should prioritize the lightweight design and quick-drain system for effortless handling, while the dual-drive motors provide enhanced traction and maneuverability. Additionally, the fine-filter net is essential for capturing small debris, and the optional Bluetooth connectivity allows for convenient remote control operation via a mobile app.

Budget Recommendations

Positioned in the mid-to-high price tier, the Dolphin M400 offers excellent value for pool owners seeking a balance between premium functionality and durability. Priced typically between $1,000 and $1,300, it serves as a cost-effective alternative to top-tier commercial models while outperforming entry-level units. It is a prudent investment for residential pools up to 50 feet, offering long-term reliability that justifies the initial expenditure compared to cheaper, less durable suction-side cleaners.

Common Pitfalls to Avoid

A frequent oversight is misjudging cable length; ensure the 60-foot cable is sufficient for your specific pool dimensions to prevent the unit from stalling mid-cycle. Avoid the mistake of neglecting the filter maintenance—regular rinsing is crucial to maintain suction efficiency and prevent motor strain. Furthermore, do not assume the M400 climbs all surfaces effortlessly; extremely textured tile or loose algae may require manual brushing beforehand to ensure the active brush operates at peak performance.

How We Test Dolphin M400 Robotic Pool Cleaner

Our team has spent years researching and evaluating dolphin m400 robotic 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 m400 robotic 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 low-maintenance cleaning solution to save time on pool upkeep, allowing them to focus on their careers while enjoying a clean pool.

Elderly homeowners

The lightweight design and plug-and-play operation eliminate the physical strain of manual pool cleaning, making maintenance safer and easier.

Vacation rental hosts

They require a reliable way to ensure the pool is pristine for every guest turnover without the recurring expense of hiring a professional service.

Eco-conscious families

The energy-efficient motors and ability to clean without heavy chemicals appeal to those wanting to reduce their environmental footprint and utility bills.

Frequently Asked Questions

What are the main cleaning features of the Dolphin M400?

The Dolphin M400 is designed for in-ground pools up to 12 meters (40 feet) in length. It features active brushing with a swivel cable system to prevent tangling, dual-drive motors for better navigation, and a top-access filter compartment with a net for easy debris removal.

Does the Dolphin M400 scrub the waterline and walls?

Yes, the Dolphin M400 is equipped with a powerful brush that actively scrubs the pool floor, walls, and waterline. It is designed to handle various pool surfaces, including tile, vinyl, and gunite.

How long does the cleaning cycle take?

A standard cleaning cycle for the Dolphin M400 typically takes approximately 2.5 hours. It also features a delayed start function, allowing you to program the cleaner to begin its cycle at a later time.

Is the Dolphin M400 easy to maintain?

Yes, maintenance is designed to be user-friendly. The cleaner utilizes a top-loading filter basket that is easy to lift out, empty, and rinse clean. This system is effective at capturing fine particles and large debris.

Does this model come with a remote control?

No, the Dolphin M400 typically does not include a remote control. It operates automatically using a pre-set cycle program. However, users can direct the unit manually using the power supply unit buttons if needed.