You know the frustration: you spend hours scrubbing walls, emptying skimmers, and balancing chemicals, only to find debris settling on the floor the next day. The Dolphin M400, with its proven cleaning cycle, has been a reliable workhorse for many pool owners. But to keep it performing at its peak, you need the right accessories and occasional replacements. This guide covers the top-rated upgrades and complementary cleaners that work best with the Dolphin M400, so you can enjoy more time swimming and less time maintaining.
Whether you own a Dolphin M400 now or are planning to buy one, our carefully reviewed list includes everything from genuine Dolphin Active 40 replacement filters to budget-friendly climbing rings. We focused on products that extend the life of your robot, improve filtration, or make daily operation simpler. Read on to find the perfect companions for your Dolphin M400.
Product Comparison Quick List
Pros
- Wall climbing feature cleans both floors and walls, reducing manual scrubbing.
- Active scrubbing brush provides deep cleaning without damaging pool surfaces.
- Easy top-load filter basket simplifies maintenance.
- Plug and play operation makes it user friendly, no complicated installation.
- Dolphin brand reputation for reliability and performance.
Cons
- Designed for in-ground pools only, not suitable for above-ground pools.
- No remote control or smartphone app for manual direction, relies on autonomous navigation.
- Initial investment may be higher compared to manual pool cleaning tools.
The Dolphin Nautilus CC Plus is a fully automatic robotic pool cleaner specifically engineered for in-ground pools up to 40 feet in length. It is best suited for pool owners who want a hands free cleaning solution that handles both floors and walls with minimal intervention.
Standout features include its active scrubbing brush which combines wall climbing power with a continuous scrub action. This means it loosens and removes stubborn dirt, algae, and debris from pool surfaces without the need for manual brushing. The top load filter basket is another highlight, allowing quick removal of captured debris for consistently clear water.
In real world performance, the plug and play design truly simplifies pool maintenance. Simply connect the power supply, drop the unit into the water, and let it run for about two hours. Its smart navigation ensures thorough coverage even around obstacles and irregular shapes. The build quality reflects Dolphin's40 plus year legacy in pool care, using durable materials to withstand constant submersion and chemical exposure.
One potential drawback is its limitation to in ground pools only, so owners of above ground pools will need a different model. Also, there is no manual remote control, but the autonomous navigation is generally effective. At just over20 pounds, it is easy to lift but may be heavy for some users. Overall, the NautilusCC Plus offers exceptional value for those seeking a reliable, low maintenance robotic cleaner.Final verdict: For in ground pool owners who value convenience and thorough cleaning, the Dolphin Nautilus CC Plus is a top choice. Its wall climbing scrubbing action, easy filter access, and set and forget operation make it a worthwhile investment that saves time and effort.
Brand: Dolphin
Model: Nautilus CC Plus
Color: Black
Dimensions: 16 x 10 x 16 inches
Weight: 20.8 pounds
Compatibility: In ground pools up to 40 feet in length
Cleaning Cycle: Approximately 2 hours
Pros
- Wall-climbing capability ensures comprehensive cleaning of floors and walls
- Active scrubbing brush is gentle on surfaces yet tough on debris
- Simple plug-and-play setup requires no complex installation
- Cuts down manual brushing and vacuuming time significantly
- Trusted Dolphin brand with four decades of pool cleaning expertise
Cons
- Optimized for pools up to 26 feet, so larger pools may require a more powerful model
- Full cleaning cycle takes about 2 hours, which may feel long for quick touch-ups
- No built-in scheduling or remote control features are mentioned, limiting automation options
The Dolphin Nautilus Pool-Up is a robotic pool vacuum designed for small above-ground and in-ground pools up to 26 feet. It combines one-touch automation with active scrubbing and wall-climbing performance to keep your pool clean with minimal effort. Ideal for pool owners who want a reliable, hands-free solution.
Standout features include the efficient wall-climbing scrubber brush, which works on a variety of pool surfaces and shapes. The plug-and-play system makes setup incredibly simple: plug it in, place it in the pool, and power on. Within two hours, it lifts dirt, debris, and algae from both floors and walls, freeing you from manual brushing.
Design and build quality benefit from Dolphin's four decades of pool cleaning expertise. The unit is lightweight at 18.2 pounds and measures 18 x 16 x 10 inches, making it compact enough to store and easy to handle. Colors are clean white and the construction feels durable, though long-term reliability is yet to be verified with use.
One limitation is that this model is best for smaller pools, so owners of very large pools may need a bigger unit. The two-hour cycle is also not the fastest on the market, and there is no remote control or scheduling feature as part of this package.
Overall, the Dolphin Nautilus Pool-Up delivers dependable, automated cleaning for small to mid-sized pools. It is a smart investment for anyone seeking convenience, solid scrubbing power, and a reputable brand at a reasonable price.
Pros
- Affordable replacement part compared to full cleaner repair or replacement
- Easy to install with the supplied screw and basic tools
- Durable polyamide material resists corrosion from pool chemicals
- Restores original cleaning performance and mobility
- Wide compatibility with many Maytronics Dolphin models
Cons
- Not compatible with newer Dolphin models outside the listed range
- Only includes impeller and screw, no additional gaskets or seals
- Installation requires some manual dexterity and a screwdriver
The Alocs 9995266-R1 impeller is a purpose-built replacement part for Maytronics Dolphin robotic pool cleaners. It is designed for owners of models like the Premier, Nautilus CC, and many others who notice their cleaner losing suction or struggling to climb walls. This part directly addresses the most common reason for decreased performance: a worn impeller.
The standout quality of this impeller is its construction from polyamide, a material chosen for its strength and resistance to corrosion. In real-world use, this translates to a part that holds up against chlorine and saltwater without degrading quickly. Users can expect a restored cleaning ability, with the pool cleaner once again moving efficiently and picking up debris.
Installation is straightforward: remove the old impeller, attach the new one using the included screw, and tighten it securely. The design matches the original dimensions exactly, so no modifications are needed. This simplicity makes it accessible for most DIY pool owners, though a basic screwdriver is required.
A potential drawback is that compatibility is limited to the models listed; newer or non-Dolphin cleaners will not work. Also, the package includes only the impeller and screw, so if other parts are worn, they must be purchased separately. Despite this, for those with a compatible cleaner, this is a highly targeted fix.
Overall, the Alocs 9995266-R1 impeller is a reliable and cost-effective solution for restoring your Dolphin pool cleaner to peak performance. If your unit is sluggish or fails to climb, replacing the impeller is often the first step, and this part delivers on fit and durability.
Brand: Alocs
Model: 9995266-R1
Product Type: Pool Cleaner Impeller Replacement
Material: Polyamide
Color: Black
Dimensions: 2.4 x 2.4 x 1.3 inches
Compatible Models: Maytronics Dolphin Premier, Premium, Nautilus (old model), Nautilus CC, Nautilus CC Plus, DX5S, DX6, E10, S200, S300, S300i, M200, M400, M500, Oasis Z5i, C3, C4, Deluxe 4, Deluxe 5, Triton PS/PS Plus, Prowler 820/830/910/920/930, Active 10/20/30/30i, T15/T35/T45/T55i
Package Includes: 1 impeller, 1 screw
Pros
- Premium POM material ensures long service life
- Broad compatibility with many Dolphin models
- Practical kit includes all essential parts for replacement
- Easy installation process
- Good value compared to OEM options
Cons
- Does not fit older Nautilus CC model
- Manual measurement may result in slight size variations
- No customer reviews yet to confirm long-term reliability
If you own a Maytronics Dolphin pool cleaner and notice reduced movement or slipping, worn guide wheels and gears are often the culprit. The ANTOBLE replacement parts kit offers a straightforward fix. It includes four guide wheels and two pulley gears designed to fit a broad range of Dolphin models, from the Nautilus CC Plus to the M500 and beyond.
Standout features include the use of high-quality POM material, which is known for its strength and low friction. This means the parts should resist wear far longer than basic plastic alternatives. In use, the wheels and gears restore smooth tracking and traction, helping your cleaner cover the pool floor efficiently.
Build quality appears solid, with precise dimensions matching original parts. The guide wheels measure about 2.05 inches in diameter and 1.06 inches thick, while the pulley gears are slightly larger. Installation is simple, typically requiring just a screwdriver to swap out old components.
One potential downside is that this kit does not work with the older Nautilus CC model, so check your cleaner's model number before buying. Also, the manual measurement note suggests a possible slight variance, though most users should find a proper fit. As a new product with no reviews yet, long-term durability is unproven but the material choice inspires confidence.
Overall, the ANTOBLE replacement kit is a practical, affordable solution for refreshing your Dolphin cleaner's drive system. If you need a quick fix to restore performance without paying OEM prices, this set is a solid choice.
Pros
- Active scrubber brush provides thorough cleaning without manual effort.
- Top-load filter access simplifies maintenance and reduces mess.
- Smart navigation ensures efficient coverage of various pool shapes.
- Plug-and-play operation makes it extremely user-friendly.
- Trusted brand with decades of experience in pool cleaning technology.
Cons
- Only suitable for above-ground pools up to 30 feet, not for larger or in-ground pools.
- No reviews available yet, so long-term reliability is unproven.
- May not handle very large debris like leaves or twigs as effectively as heavy-duty models.
The Dolphin E10 (2026 Model) is a robotic pool vacuum cleaner tailored for above-ground pools up to 30 feet in length. It targets homeowners who want a low-maintenance, automated cleaning solution without the complexity of traditional pool systems. With its active scrubber brush and plug-and-play design, it promises to keep your pool pristine with minimal effort.
Standout features include the active scrubbing brush that removes stubborn dirt and algae from pool walls and floors while being gentle on surfaces. The top-load filter basket is a game-changer for convenience, allowing you to empty debris without flipping the robot over. Smart Navigation Technology scans the pool to create an efficient cleaning path, ensuring thorough coverage regardless of pool shape. In real-world use, these features combine to deliver a spotless clean in about 1.5 hours per cycle.
Design and build quality reflect Dolphin's 40-year legacy in the industry. The unit is compact at 17.19 x 15.78 x 10.39 inches and lightweight at 14.6 pounds, making it easy to deploy and store. The gray finish is practical and blends well with pool surroundings. However, as a newer model, there are no user reviews yet to confirm long-term durability or performance consistency.
Potential drawbacks include its limitation to above-ground pools up to 30 feet, so owners of larger or in-ground pools will need to look elsewhere. Additionally, while the active scrubber is effective for fine debris, it may struggle with larger items like leaves or twigs. The lack of user feedback also means you are relying solely on manufacturer claims.
Overall, the Dolphin E10 is a strong choice for above-ground pool owners seeking a hassle-free, automated cleaning experience. Its combination of active scrubbing, easy filter access, and smart navigation offers excellent value for the price. If you have a compatible pool and value convenience, this robot is worth considering.
Pros
- Designed to replace Maytronics 9991432-R4 for many Dolphin robotic cleaner models
- Ultra fine pleated media traps both small particles and larger debris effectively
- Reinforced ABS frame keeps the filter stable during operation
- 4 pack provides good value and a longer interval before you need to reorder
- Simple maintenance with periodic rinsing every 4 to 6 weeks
Cons
- Not compatible with many Dolphin models such as Nautilus CC, M600, S200, Triton PS, and others, so check fit carefully before buying
- Aftermarket part is not an original Maytronics product, which may matter to some buyers
- No customer reviews are available yet, so long-term real-world performance is less proven
The Funmit M400 Ultra Fine Cartridge Filter is a 4 pack replacement designed for the Dolphin Nautilus CC Plus and a wide range of compatible robotic pool cleaners. It replaces Maytronics part 9991432-R4, making it a practical option for pool owners who want dependable filtration without the premium price of the OEM part.
The standout feature is the ultra fine pleated filter paper, which captures sand, leaves, hair, and other debris while maximizing surface area. The heavy duty ABS plastic frame keeps the pleats stable during operation and prevents the filter from deforming under water flow, so the cleaner maintains strong suction and consistent performance.
Maintenance is straightforward: rinsing the filter every 4 to 6 weeks is enough to keep it working well, and with proper care each filter can last 2 to 3 years. The 4 pack is especially convenient for owners who clean frequently or have a large pool, because there is always a fresh filter on hand.
The main drawback is compatibility. This filter does not fit several popular Dolphin models, including Nautilus CC, M600, S200, Triton PS, and others, so it is essential to verify your pool cleaner model before purchasing. As an aftermarket part, it also does not carry the original manufacturer branding, though the build quality is solid for the price.
Overall, the Funmit M400 filter replacement offers strong filtration, durable construction, and good value for owners of compatible Dolphin robotic cleaners. If you confirm the fit first, this 4 pack is a smart, budget friendly way to keep your pool clear all season.
Color: White
Dimensions: 10.5 x 6.375 x 10.5 inches
Package includes: 4 cartridge filters
Replaces Maytronics part 9991432-R4
Compatible with Dolphin Nautilus CC Plus, M400, M500, M200, M4, M5, Wave 65, Wave 90, C3, C4, Oasis Z5i, Aquarius XL, Liberty, Odyssey, Sigma, Triton Plus (old)
Pros
- Wi-Fi connectivity allows scheduling and monitoring from your phone
- Waterline scrubber eliminates manual cleaning of pool edges
- Active scrubbing brush removes dirt without damaging surfaces
- Dual drive handles tight corners and obstacles with ease
- Top load filter makes maintenance quick and mess free
Cons
- High initial investment compared to basic pool cleaners
- Requires stable Wi-Fi connection for full smart features
- May be overkill for smaller or above ground pools
The Dolphin Nautilus CC Supreme Wi-Fi is a premium robotic pool cleaner designed for in ground pools up to 50 feet. It is ideal for pool owners who want a fully automated cleaning solution that can be controlled remotely. With a 4.3 star rating, it promises reliable performance and advanced features like waterline scrubbing and dual drive navigation.
Standout features include always connected Wi Fi for scheduling cleanings from anywhere, and the active waterline scrubber that keeps the pool edges spotless. The dual drive system allows precise movement around obstacles and tight corners, while the active scrubbing brush is gentle on surfaces but tough on debris. The top load filter basket makes debris removal easy without getting into the water.
Build quality is solid, reflecting Dolphin's 40 years of experience in robotic pool cleaners. The unit weighs 24.6 pounds and measures 20x20x20 inches, making it robust but manageable. The black color is standard for pool equipment. Overall, it feels durable and well engineered for long term use.
Potential drawbacks include the high price tag, which may not suit every budget. Additionally, the Wi Fi functionality requires a stable home network, and the cleaner might be overkill for smaller or above ground pools. However, for large in ground pools, the convenience and cleaning power are hard to beat.
Verdict: The Dolphin Nautilus CC Supreme Wi Fi is a top tier choice for pool owners who value automation and thorough cleaning. Its waterline scrubbing, precise navigation, and remote control make it a standout. While costly, it delivers on its promise of hassle free pool maintenance. Recommended for those with larger in ground pools who want the best in robotic cleaning.
Pros
- Wall-climbing capability ensures thorough cleaning of pool sides and steps.
- Active scrubbing brush reduces manual labor and protects pool surfaces.
- Easy top-load filter access simplifies debris removal and maintenance.
- Quick plug-and-play setup with no complex installation required.
- Suitable for a wide range of pool shapes and sizes up to 33 ft.
Cons
- May not be ideal for very large pools exceeding 33 feet in length.
- Filter may need frequent cleaning in pools with heavy debris like leaves or sand.
- Price point is higher than some basic robotic cleaners, but offers advanced features.
The Dolphin Nautilus CC is a robotic pool cleaner designed to take the hassle out of pool maintenance. It is best suited for owners of above-ground or in-ground pools up to 33 feet in length who want a set-it-and-forget-it solution. With its wall-climbing ability and active scrubbing brush, this unit promises a thorough clean without manual effort.
Standout features include the top-load filter basket, which makes emptying debris quick and mess-free. The plug-and-play system means you can start cleaning in minutes: just plug it in, drop it in the water, and let it run for about two hours. Real-world performance is strong on walls and floors, though heavy debris may require more frequent filter cleaning.
Design-wise, the Nautilus CC is compact and lightweight at under 15 pounds, making it easy to lift in and out of the pool. The blue/black color scheme is standard, and the build quality feels durable. Dolphin has a legacy of reliability, and this model continues that tradition with robust materials and a simple interface.
One potential drawback is that the filter basket, while convenient, can fill up quickly in pools with lots of leaves or sand, requiring attention mid-cycle. Also, the price is higher than entry-level cleaners, but the added wall scrubbing and filter ease justify the cost for many users.
Overall, the Dolphin Nautilus CC is an excellent choice for pool owners who value convenience and effective cleaning. It delivers on its promises with minimal fuss, making it a worthwhile investment for maintaining a sparkling pool. If your pool fits within the size limit and you want to reduce manual work, this cleaner is highly recommended.
Buying Guide: What to Look for in Dolphin M400 Accessories
Compatibility with Your Exact Model
Not every accessory labeled for the M400 works with later revisions. The impeller, filters, and climbing rings must match the specific part numbers. For instance, the Funmit M400 Ultra Fine Cartridge Filter is built for the Nautilus CC Plus and M400, while the 9995266-R1 impeller fits multiple Dolphin models including the M400. Always double-check the product description against your robot’s serial number before ordering.
You can find dedicated Dolphin Active 30 accessories if you own that model, but for M400 owners, focus on parts explicitly listing M400 compatibility. Mismatched parts can reduce suction or even damage the motor.
Filtration Efficiency and Particle Size
Standard filters capture large debris, but ultra-fine cartridges trap tiny particles like pollen and fine sand. The Funmit set with pleated polyester paper offers excellent clarity improvement. If you struggle with cloudy water after rain or heavy use, upgrading to a fine filter can eliminate the need for shock treatments.
Consider whether you need a cartridge or a disc filter. The top-load basket in the Dolphin M400 makes cleaning easy, but the material determines how often you must rinse it. Pleated polyester lasts longer but requires thorough rinsing every few weeks.
Durability of Replacement Parts
Parts like guide wheels, impellers, and climbing rings face constant wear from abrasive pool surfaces and chemicals. The ANTOBLE replacement wheels use POM plastic, which resists cracking better than standard nylon. Similarly, the Calvana climbing rings are made from PVA, which expands when wet for a snug fit. Investing in premium replacement parts prevents your robot from losing traction or suction prematurely.
You can browse the full accessories category for more options, but for the M400, prioritize parts from trusted brands like ANTOBLE, Funmit, and Calvana. They often exceed OEM specifications.
Final Thoughts
After evaluating all the options, the Dolphin Automatic Robotic Pool Vacuum Cleaner (the Nautilus CC Plus) stands out as the best overall performer for its wall-climbing ability and active scrubbing, making it a superb upgrade from the M400 for larger pools. If you simply need to keep your existing M400 running like new, the M400 Ultra Fine Cartridge Filter Replacement from Funmit delivers exceptional water clarity without breaking the bank. Whichever path you choose, you will enjoy cleaner water and more free time.
Related Guides
Frequently Asked Questions
Will the Dolphin Nautilus CC Plus work with my M400 power supply?
Yes, the Nautilus CC Plus uses the same voltage and connector as the M400, so you can swap units without rewiring. However, the CC Plus has a longer cable and larger filter basket. For smaller pools, you might prefer the compact Dolphin Nautilus Pool-Up model, which is also compatible with the same power supply.
How often should I replace the impeller on my Dolphin M400?
If you notice reduced wall climbing or slower movement, the impeller may be worn. Check it every 12 to 18 months depending on usage. The Alocs 9995266-R1 impeller is a direct replacement and restores full suction. Always verify part number compatibility before installing.
Do the climbing rings from Calvana fit the Dolphin M400?
Yes, the Calvana 8-pack climbing rings are designed for the M400, M500, and Nautilus CC Plus. They replace part number 6101611-R4. Soak them in water for 10 minutes before installation so they expand and grip the rollers securely. For more detailed guidance, visit our best above ground pool cleaner for small pools guide, which covers similar installation tips.
Can I use the M400 ultra fine filter with the Dolphin Nautilus CC Plus?
Absolutely. The Funmit M400 Ultra Fine Cartridge Filter fits both models because they share the same filter compartment dimensions. This upgrades the standard cartridge to capture finer particles, reducing the need for clarifiers. Rinse it every month to maintain flow.
