Imagine opening your pool to find cloudy water and debris floating near the surface despite running your Dolphin Nautilus CC. Often the culprit is a clogged or worn out filter. Upgrading to an ultra fine filter basket can transform your pool cleaner into a particle trapping powerhouse. In this guide we evaluate the best Dolphin Nautilus CC ultra fine filter replacements so you can enjoy a pristine pool with minimal effort. We have gathered nine top options from brands like REEPLAR, Yinage, SUNRRA, Kerneed, Fiitzn, K Trends, and LBLVBNEWD to help you make an informed decision. For more background on compatible filters check our roundup of top replacements for 2026.
Pros
- Ultra-fine 10-micron filtration for superior water clarity
- Reusable and easy to clean with minimal maintenance
- Durable ABS construction lasts 2-3 years
- Fits multiple Dolphin and compatible pool cleaner models
- Backed by a 1-year warranty
Cons
- Not compatible with Nautilus CC Pro or CC Supreme models
- May require removing a plastic piece in older Active 10 or S50 robots for proper fit
- Zero customer reviews available at launch, so long-term reliability is unverified
The SUNRRA Ultra-Fine Filter Basket is a replacement part designed specifically for a wide range of Dolphin and compatible robotic pool cleaners. It is the ideal upgrade for pool owners using models like the Dolphin Nautilus CC, Proteus DX3, Explorer E20, Active 10/15, and many others. By replacing your worn or clogged filter basket with this ultra-fine variant, you can achieve noticeably clearer pool water.
The standout feature of this filter basket is its ability to capture particles as small as 10 microns. This includes fine dust, algae, and silt that standard filters often miss. As a result, your pool water remains crystal clear with less reliance on chemical flocculants or clarifiers. The reusable design means you simply rinse it every 4 to 6 weeks, saving money on disposable filters and reducing waste.
Constructed from durable ABS plastic, the basket is built to withstand the harsh pool environment and frequent cleaning cycles. SUNRRA claims a lifespan of 2 to 3 years with proper maintenance. The filter fits securely into the designated robot models, ensuring a tight seal to prevent bypass of unfiltered water. However, note that for older versions of the Active 10 or S50, you may need to remove an internal plastic piece for full compatibility.
One limitation is that this basket does not work with the Nautilus CC Pro or CC Supreme models, so check your robot's model before purchasing. Additionally, there are currently no customer reviews to confirm real-world performance, though the product comes with a 1-year warranty for peace of mind. The slightly higher initial cost may be offset by long-term durability and improved filtration.
For pool owners with compatible robotic cleaners, the SUNRRA Ultra-Fine Filter Basket is a worthwhile investment. It offers superior particle capture, easy maintenance, and a robust build. While compatibility caveats exist for specific models, most users will appreciate the enhanced water clarity. If you are looking to maximize your pool cleaner's performance, this replacement basket is a solid choice.
Pros
- Microfiltration prevents clogging and maintains strong suction for thorough cleaning
- Sturdy ABS construction ensures durability even in heavy-duty use
- Wide compatibility saves hassle of finding exact match for various Dolphin models
- Simple maintenance with periodic rinsing; no tools required
- Cost-effective alternative to OEM parts with comparable performance
Cons
- May require more frequent rinsing if the pool is heavily soiled or has fine debris
- Only one basket included; some pool owners may need to purchase additional for larger pools
- Not compatible with all Dolphin models; verify compatibility list before purchase
The Fiitzn Ultra Fine Filtration Basket is a replacement filter designed for a wide range of Dolphin robotic pool cleaners, including models like the S50, Active 15, Echo, Nautilus CC, Encore, E10, E20, Proteus DX3, Solo, and Advantage. This part (9991460-R1) is ideal for pool owners seeking an affordable, high-performance alternative to the original filter. It is especially suited for those who want to improve water clarity by trapping fine particles without sacrificing cleaning efficiency.
The standout feature of this basket is its microfiltration technology, which captures small debris while allowing larger particles to pass through. This design prevents the filter from clogging quickly, ensuring consistent suction and longer cleaning cycles. In real-world use, this means less downtime for rinsing and more effective pool maintenance, even in dirty conditions. The basket maintains strong performance over weeks of use before needing a quick rinse.
Build quality is solid thanks to the ABS plastic frame, which resists cracking and deformation under pressure. The filter layer is securely supported, reducing the risk of tearing during operation. Installation is straightforward: it fits exactly like the original part, so no modifications or adapters are needed. Rinsing every 4-6 weeks keeps it working optimally, and with proper care, the basket can last 2-3 years, offering excellent value.
One potential drawback is that in extremely dirty pools, the filter may need more frequent rinsing to maintain flow. Additionally, the package includes only one basket, so owners of larger pools might need to buy a second. Also, while compatibility is broad, it does not cover every Dolphin model, so double-checking the list is wise. These are minor trade-offs for the price and performance.
Overall, the Fiitzn Ultra Fine Filtration Basket delivers on its promise of efficient fine debris capture and durability. It is a smart upgrade or replacement for Dolphin pool cleaner owners who want to keep their water crystal clear without breaking the bank. The combination of microfiltration, sturdy construction, and broad compatibility makes it a reliable choice for routine pool care.
Dimensions: 9.1 x 7.1 x 5.3 inches
Weight: 1 pound
Material: ABS plastic frame with microfiltration mesh
Compatibility: Dolphin models S50, S100, Active 15, Echo, T15, Proteus DX3, E20, Cayman, Escape, Nautilus CC, Encore, E10, Solo, Advantage
Replaces OEM Part: Maytronics 9991460-R1
Maintenance: Rinse every 4-6 weeks; expected lifespan 2-3 years with proper care
Pros
- Superior filtration from ultra fine pleated material, outperforming standard non-pleated filters.
- Durable ABS frame withstands regular use and chemical exposure without cracking.
- Cost-effective 4-pack reduces per-cartridge cost and frequency of replacement.
- Easy to clean and reuse, extending the life of each filter panel.
- Backed by a 1-year warranty for added confidence.
Cons
- Not compatible with older Nautilus CC, Nautilus (original), or Triton models; verify your robot before ordering.
- Some users may find the initial fit slightly snug in certain robot models, though it settles over time.
- Pleated filters may require more frequent rinsing in heavy-debris pools compared to coarse mesh options.
The SUNRRA Ultra Fine Filters are a versatile replacement option for a wide range of Dolphin robotic pool cleaners, including the Nautilus CC Plus, CC Supreme, M200, M400, M500, and many others. If you own one of these popular Maytronics models and want to improve water clarity, this 4-pack of pleated cartridges is a smart upgrade.
What sets these filters apart is their ultra fine pleated construction. Unlike standard non-pleated cartridges that let fine sediment slip through, the dense pleats trap even tiny particles like algae, pollen, and dust. The result is noticeably clearer pool water and a cleaner floor after each cycle. In real-world use, the filtration performance is excellent, especially for pools that struggle with cloudy water.
The build quality is solid: the frame is made from heavy-duty ABS plastic that resists cracking and tearing, even after repeated rinsing and seasonal storage. SUNRRA claims a lifespan of 2-3 years, which is reasonable if you clean them every 4-6 weeks. The 4-pack also means you have spares on hand, saving you from last-minute replacements.
One important note: these filters are not compatible with the original Nautilus CC, older Nautilus, or Triton series models. Always double-check your robot's model number before purchasing. Also, because the pleats are so fine, they may clog faster in pools with heavy leaf debris; you may need to rinse them more often than coarse mesh filters.
Overall, the SUNRRA Ultra Fine Filters offer excellent value for Dolphin owners who want premium filtration without paying premium prices. The 1-year warranty adds peace of mind, and the 4-pack ensures you're set for multiple seasons. If your robot is compatible, this is a highly recommended upgrade for crystal-clear pool water.
Buying Guide: What to Look for in a Dolphin Nautilus CC Ultra Fine Filter
Compatibility with Your Dolphin Model
Not all ultra fine filters fit every Dolphin robot. The Nautilus CC and Nautilus CC Plus use different part numbers. Models like the 9991460-R1 fit the standard Nautilus CC, E10, S50, and others, while the 9991432-R4 works with the Nautilus CC Plus, M400, and M500. Always confirm your robot’s model before ordering. Some listings include a note about removing an internal plastic piece for older versions of Active 10 or S50. This small step ensures the lid closes properly. For a deeper look at compatible options see our guide to aftermarket replacement filters.
Filtration Efficiency and Micron Rating
Ultra fine filters capture particles as small as 10 microns, including dirt, hair, dust, and even diatoms. Some designs use a pleated fabric that traps more debris than standard mesh. Others employ a microfiltration technology that lets fine particles pass through while catching larger items. This prevents the cartridges from clogging too quickly in a dirty pool. Look for descriptions that mention “ultra fine” or “microfiltration” to ensure maximum clarity. If your pool tends to collect leaves or sand, a basket with a spring loaded bottom can simplify removal of big debris.
Build Quality and Longevity
A durable frame prevents cracking during operation and extends the filter’s life. Most premium replacements use a sturdy ABS plastic frame that supports the filter media and withstands repeated use. Many brands claim their filters last two to three years with proper care. Rinsing every four to six weeks keeps performance high. Some filters come in multi packs, offering excellent value over time. For those who prefer OEM exactness our article on OEM replacement filters can help narrow choices.
Ease of Installation and Maintenance
Most ultra fine filter baskets snap into place without tools. You simply remove the old basket and insert the new one. Some products include replacement filter panels that clip into the existing frame. Cleaning is straightforward: lift out the basket, rinse with a garden hose, and let it dry. Avoid using a pressure washer that could damage the fabric. For models with a cartridge style filter, the cleaning process is similar. If you are new to filter maintenance check our guide on top filter basket options for quick start tips.
Final Thoughts
Choosing the right ultra fine filter for your Dolphin Nautilus CC comes down to matching your robot’s model and your cleaning expectations. For owners of the standard Nautilus CC the Ultra-Fine Filter Basket Compatible with Dolphin from SUNRRA offers a reliable balance of fit and performance at an attractive price point. If you have the Nautilus CC Plus or a similar M series robot the M400 Ultra Fine Cartridge Filters Compatible by Kerneed deliver exceptional clarity with their pleated design and come in a convenient four pack. Whichever you pick, regular rinsing every few weeks will keep your pool sparkling all season long.
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Frequently Asked Questions
Will an ultra fine filter work in my Dolphin Nautilus CC?
Yes, as long as you choose a replacement that lists compatibility with the Nautilus CC specifically. The part number 9991460-R1 fits the standard Nautilus CC, while the 9991432-R4 is for the Nautilus CC Plus and similar models. Double check your robot’s model label before purchasing.
How often should I clean or replace the filter?
Rinse the filter every four to six weeks under running water to remove trapped debris. With proper care the filter can last two to three years. If you notice reduced suction or cloudy water despite cleaning, it may be time for a replacement.
Can I use a Nautilus CC Plus filter in a standard Nautilus CC?
No, the Nautilus CC Plus uses a different cartridge design (part 9991432-R4) that is not compatible with the standard Nautilus CC. Always verify the part number against your robot’s manual. Our article on genuine replacement filters can help clarify model specific options.
What is the micron rating of these ultra fine filters?
Most ultra fine filters for the Dolphin Nautilus CC capture particles down to approximately 10 microns. This includes fine dust, pollen, and algae spores. The pleated designs offer even higher efficiency for sparkling water.
