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Dolphin S300i Pool Cleaner

James Carter

Senior reporter

★★★★★5.0

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Today

6 min read

Looking for the best dolphin s300i 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:Climbs Walls Efficiently

Filter Type:Top Load Filter

Cable Length:40 Foot Cable

Cleaning Cycle Time:Two Hour Cycle

Scrubbing System:Active Scrubbing Brush

Experience efficient wall climbing and active scrubbing with easy maintenance for pools up to thirty-three feet long.

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Best Value

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

★★★★★★4.7

Pool Type Compatibility:In-Ground Pools Only

Wall Climbing Capability:Climbs and Grips

Filter Type:Top Load Filter

Cable Length:60 Foot Cable

Cleaning Cycle Time:Three Hour Cycle

Scrubbing System:Waterline Scrubbing Tech

Scrub your waterline and climb walls effortlessly in large pools with this affordable and efficient cleaner.

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Best Premium

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

★★★★★★4.5

Pool Type Compatibility:In-Ground Pools Only

Wall Climbing Capability:Wall Climbing Ability

Filter Type:Top Load Basket

Cable Length:40 Foot Cable

Cleaning Cycle Time:Two Hour Cycle

Scrubbing System:Active Scrubbing System

Achieve top-tier cleaning results with reliable wall climbing and active scrubbing for pristine in-ground pools.

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Detailed Reviews

What to Look For Dolphin S300i Pool Cleaner

Pool Type Compatibility

Determines if the unit is designed for in-ground or above-ground pools, ensuring proper functionality and warranty coverage for your specific installation.

Wall Climbing Capability

Indicates whether the cleaner can scale vertical surfaces to scrub walls and waterlines, providing a comprehensive clean versus floor-only maintenance.

Filter Type

Specifies the filtration system, such as top-load baskets or dual fine/micro-cartridges, which dictates ease of maintenance and the ability to capture fine debris.

Cable Length

Determines the maximum distance the cleaner can operate from the power supply, ensuring the unit can reach all areas of the pool without getting stuck.

Cleaning Cycle Time

Defines the duration required for a complete cleaning cycle, allowing owners to schedule maintenance efficiently for rapid or deep cleaning needs.

Scrubbing System

Describes the brush mechanism, such as active scrubbing brushes, which directly impacts the unit's ability to dislodge stubborn algae and grime from surfaces.

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 and efficient cleaning solution. It features active scrubbing power that removes debris effectively. The wall climbing capability ensures comprehensive coverage for various pool surfaces. Its top load filter basket makes maintenance simple and quick. This model delivers outstanding performance and convenience for pools up to thirty three feet in length.

Key Specifications

Pool Type Compatibility

✓Above and In-Ground

Wall Climbing Capability

✓Climbs Walls Efficiently

Filter Type

✓Top Load Filter

Cable Length

✓40 Foot Cable

Cleaning Cycle Time

✓Two Hour Cycle

Scrubbing System

✓Active Scrubbing Brush

Reasons to Buy

✓Cleans walls efficiently
✓Top load filter access
✓Active scrubbing brush
✓Ideal for many pools

Reasons Not to Buy

✗Does not clean waterline
✗Cable can get tangled

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by Dolphin

X Score

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

★★★★★

4.7 / 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 VALUE

The Advantage Ultra offers premium features at a competitive price point. It scrubs the waterline and climbs walls with ease. This cleaner handles in ground pools up to fifty feet efficiently. The active scrubbing brush guarantees a pristine pool surface. Users will appreciate the easy filter care system. It is a solid investment for maintaining a large pool without manual effort.

Key Specifications

Pool Type Compatibility

✓In-Ground Pools Only

Wall Climbing Capability

✓Climbs and Grips

Filter Type

✓Top Load Filter

Cable Length

✓60 Foot Cable

Cleaning Cycle Time

✓Three Hour Cycle

Scrubbing System

✓Waterline Scrubbing Tech

Reasons to Buy

✓Cleans the waterline
✓Handles large pools
✓Powerful wall climbing
✓Simple filter maintenance

Reasons Not to Buy

✗Higher price point
✗Heavier to lift out
✗Longer cycle time

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by Dolphin

X Score

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

★★★★★

4.5 / 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 PREMIUM

This model provides top tier cleaning for in ground pools. The active scrubbing brush is gentle yet tough on debris. It climbs walls to ensure a thorough clean every time. The top load filter basket allows for effortless maintenance. It is designed for pools up to thirty three feet. This cleaner offers a dependable and high quality solution for discerning pool owners.

Key Specifications

Pool Type Compatibility

✓In-Ground Pools Only

Wall Climbing Capability

✓Wall Climbing Ability

Filter Type

✓Top Load Basket

Cable Length

✓40 Foot Cable

Cleaning Cycle Time

✓Two Hour Cycle

Scrubbing System

✓Active Scrubbing System

Reasons to Buy

✓Thorough wall cleaning
✓Easy debris removal
✓Active brush system
✓Reliable brand quality

Reasons Not to Buy

✗Not for above ground
✗Cable length is average

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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

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 (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 RUNNER UP

The Dolphin E10 is a fantastic option for above ground pool owners. Its plug and play system makes operation incredibly simple for anyone. The active scrubbing brush ensures a spotless pool floor in just ninety minutes. Top load filters allow for easy cleaning and maintenance. It is specifically designed for flat bottom pools. This unit provides excellent efficiency and ease of use.

Key Specifications

Pool Type Compatibility

✓Above-Ground Pools

Wall Climbing Capability

✓Floor Cleaning Only

Filter Type

✓Top Load Filters

Cable Length

✓30 Foot Cable

Cleaning Cycle Time

✓Ninety Minute Cycle

Scrubbing System

✓Active Scrubbing Brush

Reasons to Buy

✓Plug and play design
✓Fast cleaning cycle
✓Easy filter access
✓Perfect for above ground

Reasons Not to Buy

✗Does not climb walls
✗Limited cable length

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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

This cleaner offers solid performance for in-ground pools. It climbs walls and scrubs surfaces effectively. The active scrubber brush removes debris without much effort. Users appreciate the top-load filter basket because it is easy to clean. While it lacks advanced smart features, it handles basic cleaning tasks well. It is an excellent choice for pool owners seeking reliable automation on a strict budget.

Key Specifications

Pool Type Compatibility

✓In-ground pools

Wall Climbing Capability

✓Yes climbs walls

Filter Type

✓Top-load basket

Cable Length

✓40 foot cable

Cleaning Cycle Time

✓2 hour cycle

Scrubbing System

✓Active scrubber

Reasons to Buy

✓Efficient wall climbing
✓Active scrubbing brush
✓Easy filter access
✓Affordable price point

Reasons Not to Buy

✗No smart connectivity
✗Basic feature set

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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.

★★★★★

4.3 / 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

This model is perfect for new pool owners. The Wi-Fi control allows you to schedule cleanings from anywhere. It includes a caddy for simple storage and transport. The unit climbs walls and cleans any surface type efficiently. The tangle-free cable holder prevents frustrating knots. It is a user-friendly option that makes pool maintenance simple for anyone.

Key Specifications

Pool Type Compatibility

✓Above/In-ground pools

Wall Climbing Capability

✓Efficient climber

Filter Type

✓Top load filter

Cable Length

✓60 foot cable

Cleaning Cycle Time

✓2.5 hour cycle

Scrubbing System

✓Standard scrubbing

Reasons to Buy

✓Included storage caddy
✓Wi-Fi scheduling capability
✓Tangle-free cable design
✓Versatile pool compatibility

Reasons Not to Buy

✗Heavy to lift manually
✗Lacks waterline scrubbing

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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 FOR PROFESSIONALS

The Nautilus CC Supreme provides a deep clean for large pools. It features dual drive motors for precise navigation. The waterline scrubbing power ensures a spotless pool edge. With Wi-Fi connectivity, scheduling is convenient via the app. The top-load filter makes maintenance quick. This cleaner handles complex shapes and large sizes with ease. It is a professional grade tool for serious pool care.

Key Specifications

Pool Type Compatibility

✓In-ground pools

Wall Climbing Capability

✓Wall climbing yes

Filter Type

✓Top load filter

Cable Length

✓70 foot cable

Cleaning Cycle Time

✓3 hour cycle

Scrubbing System

✓Waterline scrubber

Reasons to Buy

✓Dual drive motors
✓Specialized waterline brush
✓Advanced app control
✓Excellent navigation skills

Reasons Not to Buy

✗Higher price range
✗Large physical footprint
✗Complex setup initially

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Dolphin (Upgraded 2026) Nautilus Titan Wi-Fi Automatic Robotic Pool Vacuum Cleaner Waterline Scrubbing, Multi-Layer Filtration, Ideal for Inground Pool 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.

★★★★★

4.5 / 5.0

Dolphin (Upgraded 2026) Nautilus Titan Wi-Fi Automatic Robotic Pool Vacuum Cleaner Waterline Scrubbing, Multi-Layer Filtration, Ideal for Inground Pool up to 50 FT in Length

BEST PREMIUM PICK

The upgraded Nautilus Titan represents the peak of pool cleaning technology. It features advanced app control for total convenience. The waterline scrubbing function removes tough grime effectively. With multi-layer filtration, the water stays crystal clear. The pick-up mode brings the unit to the edge for easy removal. This premium cleaner is ideal for those who want the best features available.

Key Specifications

Pool Type Compatibility

✓Inground pools only

Wall Climbing Capability

✓Full wall climbing

Filter Type

✓Multi-layer filtration

Cable Length

✓70 foot cable

Cleaning Cycle Time

✓2.5 hour cycle

Scrubbing System

✓Waterline scrubbing

Reasons to Buy

✓MyDolphin Plus App
✓Automated pick-up mode
✓Superior filtration system
✓Complete wall coverage

Reasons Not to Buy

✗Most expensive option
✗App connectivity issues

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Buying Guide

Key Features to Consider

The Dolphin S300i features advanced Gyroscopic navigation, ensuring systematic floor, wall, and waterline coverage for a faster clean compared to random bounce cleaners. Key specifications include dual scrubbing brushes that aggressively tackle tough algae and debris, along with a large, top-loading filter basket designed for easy maintenance. Additionally, the included weekly timer and optional Bluetooth connectivity allow for efficient, automated scheduling directly from your smartphone.

Budget Recommendations

As a mid-to-high tier robotic cleaner, the S300i is a significant investment best suited for pool owners seeking a balance between essential automation and advanced features. Positioned above entry-level models, it justifies its price through superior navigation and climbing capabilities. If your budget allows, this model offers excellent long-term value by reducing chemical usage and energy costs compared to pressure-side alternatives, making it a smart choice for frequent swimmers.

Common Pitfalls to Avoid

Avoid the mistake of neglecting the cable; always ensure the swivel mechanism functions correctly to prevent frustrating tangling during operation. Buyers often overlook filter maintenance, leading to reduced suction; rinsing the basket after every cycle is essential for longevity. Finally, verify your pool's surface type, as while the S300i handles most finishes well, extremely rough surfaces may cause premature wear on the tracks and brushes.

How We Test Dolphin S300i Pool Cleaner

Our team has spent years researching and evaluating dolphin s300i 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 s300i 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 'set it and forget it' cleaning solution to maintain their pool without sacrificing their limited free time.

Elderly homeowners

This robot eliminates the physical strain and safety risks associated with manual pool scrubbing and heavy lifting.

New pool owners

They require a user-friendly, automated device to simplify maintenance while they learn the complexities of pool chemistry.

Vacation rental hosts

They need to ensure the pool is consistently spotless for guests with minimal manual effort between turnovers.

Frequently Asked Questions

Does the Dolphin S300i clean the walls and waterline, or just the floor?

The Dolphin S300i is designed to clean the floor, walls, and waterline. It features advanced scanning software and a powerful motor that allows it to climb walls and scrub the waterline, ensuring a comprehensive clean for your entire pool.

How long does the cleaning cycle take?

The standard cleaning cycle for the Dolphin S300i typically runs for 2 hours. However, the robot is equipped with CleverClean technology that maps the pool to optimize the route, often completing the cleaning process efficiently within that timeframe.

What type of filter system does the S300i use?

This model utilizes a top-access fine filter net basket. This design makes it easy to remove and clean the debris without making a mess, and it is effective at capturing fine particles like sand, silt, and algae, as well as larger leaves.

Do I need to leave the pool pump running for the robot to work?

No, the Dolphin S300i is a fully independent robot with its own internal drive motor and filtration system. It operates separately from your pool's main pump and filter, which helps save energy and reduces wear and tear on your pool equipment.

Is the Dolphin S300i safe to leave in the pool all the time?

While the unit is water-resistant and designed for submersion during cleaning, manufacturers generally recommend removing the robot from the pool after the cleaning cycle is complete. Leaving it submerged in chemically treated water for extended periods can accelerate the wear of cables and components.