You pull back the pool cover on a sunny morning, only to find your robotic cleaner has left behind a trail of fine debris, and the water looks hazy instead of crystal clear. This frustrating scenario often points to worn-out filters that can no longer capture the smallest particles. The Dolphin Nautilus CC Supreme is a reliable workhorse, but even the best pool robot needs fresh replacement filters to maintain peak performance. In this guide, we have evaluated eight top-rated replacement panels from brands including SUNRRA, Kerneed, Funmit, and PUREBURG, so you can choose the ideal upgrade for your pool. For more on keeping your cleaner in top shape, check out our guide to Dolphin Nautilus CC replacement filters.
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.
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)
Buying Guide
Filtration Type: Fine vs. Ultra-Fine
The first decision you face is choosing between fine mesh and ultra-fine pleated panels. Fine mesh filters, like the PUREBURG Fine Filter Panels Compatible, use a flat screen material that excels at trapping larger debris such as leaves, twigs, and pebbles. They maintain high water flow, making them ideal for seasonal cleanups or pools with heavy organic matter. In contrast, ultra-fine pleated filters, such as the Poolzilla Pool Cleaner Ultra-Fine Filters, feature densely folded fabric that captures sand, sediment, and microscopic particles, leaving your pool water sparkling. For most pool owners, an ultra-fine filter provides the best balance of clarity and debris removal, but if your pool collects a lot of large debris, you might want to keep a fine mesh set on hand. Learn more about the differences in our Dolphin Nautilus CC ultra-fine filter review.
Compatibility and Fit
Not all replacement filters fit every Dolphin model. The Nautilus CC Supreme, along with models like the M200, M400, M500, Nautilus CC Plus, and several others, typically uses part numbers 9991432-R4 (ultra-fine) or 9991433-R4 (fine mesh). Always check your cleaner’s manual or look for the part number on your existing filter frame. Many aftermarket brands, such as SUNRRA and Kerneed, explicitly list compatible models, so you can verify before purchasing. A filter that is too small or too large will not seal properly, allowing debris to bypass the filtration system. If you have an older model like the Nautilus CC (without Plus) or Triton, double-check the fit, as many filters are not designed for those units. For more on compatibility, see our Dolphin Nautilus CC fine filter guide.
Build Quality and Durability
The frame material and filter paper quality directly affect how long your panels last. Most premium replacements use heavy-duty ABS plastic for the frame, which resists cracking and warping from constant water exposure and pressure. The filter paper itself should be dense and pleated to maximize surface area without tearing. Brands like Funmit and SUNRRA emphasize their use of thick, pleated fabric and strong plastic supports, which help the filter hold its shape even under high flow. A well-constructed filter can last two to three years with regular rinsing, while cheaper panels may degrade after a single season. Investing in a durable set saves you money and hassle over time.
Pack Size and Value
Replacement filter panels are typically sold in packs of four or eight. A standard set of four panels fills one cartridge frame, so an eight-pack gives you two full changes. If you plan to rotate filters or want a backup set, the larger packs offer better value. For example, the SUNRRA Ultra Fine Filters Compatible with Dolphin comes in both 4-pack and 8-pack options, letting you choose based on your budget and usage. Keep in mind that ultra-fine pleated filters may need more frequent rinsing than fine mesh panels, so having extra sets on hand ensures you always have a clean filter ready. For more tips on maintaining your pool robot, visit our Replacement Filters category page.
Final Thoughts
Choosing the right replacement filter for your Dolphin Nautilus CC Supreme comes down to balancing filtration needs, compatibility, and value. For most pool owners, the SUNRRA Ultra Fine Filters Compatible with Dolphin deliver exceptional clarity with their pleated design and durable ABS frame, while the Poolzilla Pool Cleaner Ultra-Fine Filters offer a budget-friendly alternative that still captures fine particles effectively. Whichever you choose, regular rinsing every four to six weeks will keep your pool pristine all season long.
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Frequently Asked Questions
How often should I replace my Dolphin Nautilus CC Supreme filters?
With proper care and regular rinsing, your filter panels can last two to three years. Replace them when you notice tears, warping, or a significant drop in cleaning performance. For heavy-use pools, consider swapping them every 18 to 24 months.
Can I use ultra-fine filters for heavy leaf debris?
Ultra-fine pleated filters excel at capturing small particles but can clog quickly with large leaves and twigs. For heavy leaf loads, use fine mesh panels first to remove large debris, then switch to ultra-fine for polishing the water. This two-step approach keeps your cleaner running efficiently.
Are aftermarket filters as good as OEM Dolphin filters?
Many aftermarket brands like SUNRRA, Kerneed, and Funmit use high-quality materials that match or exceed OEM performance. They are often more affordable and offer similar durability. Just ensure the filter is compatible with your specific model to avoid fitment issues.
How do I clean my Dolphin Nautilus CC Supreme filters?
Rinse the panels with a garden hose every four to six weeks to remove trapped debris. For stubborn buildup, soak them in a mild detergent solution and rinse thoroughly. Avoid using harsh chemicals or high-pressure washers, as they can damage the filter material. For more maintenance tips, check our Dolphin Nautilus CC replacement filter guide.
