When your robotic pool cleaner starts leaving debris behind or the water flow weakens, the problem is often a clogged or worn-out filter cartridge. Without a proper replacement, even the best pool robot struggles to keep the water clear. In this guide, we evaluate seven of the best robotic pool cleaner filter cartridges on the market, covering compatibility with popular brands like Dolphin, Hayward, and more. Whether you own a TigerShark, SharkVac, or AquaVac, we have the right filter options for your pool.
Choosing the right filter cartridge is essential for maintaining peak performance. Our picks include top-rated models from TUOWS, Poolzilla, Henkgo, Funmit, CLLOMAGY, SUNRRA, and KTWT. For more insights on maintaining your pool robot, check out our guide to pool robot replacement filters.
Pros
- Ultra-fine filtration traps even tiny particles for superior water clarity.
- Easy numbered installation system reduces setup time and guesswork.
- Washable and reusable design offers long-term value and eco-friendliness.
- Broad compatibility with many Dolphin and Maytronics robotic pool cleaner models.
- Sturdy build quality withstands regular use and cleaning without tearing.
Cons
- May require more frequent cleaning than standard filters due to ultra-fine mesh trapping more debris.
- Not compatible with all Dolphin models; double-check compatibility before purchase.
- Some users may find the initial fit slightly tight on certain cleaner baskets.
The Henkgo ultra-fine filter panels are a direct replacement for the OEM part 9991467-R4, designed specifically for Dolphin robotic pool cleaners. These pleated cartridge filters are ideal for pool owners who want to maintain sparkling water without frequent skimming. They fit a wide range of models including the S200, Active 20, Proteus DX4, M600, and many more, making them a versatile upgrade for most Dolphin owners.
Standout features include the ultra-fine pleated material that captures sand, gravel, leaves, and even microscopic debris. In real-world use, these filters dramatically improve water clarity compared to standard mesh filters. The numbered panels (1-4) simplify installation: remove in order and replace in reverse, so even first-time users can swap them in minutes. The filters are also washable with a garden hose, retaining their shape and effectiveness after repeated cleanings.
Build quality is reassuringly sturdy. The pleated material holds up well under water pressure and regular cleaning. Each panel measures 9 x 8 x 2.1 inches and weighs just over a pound, making them lightweight yet durable. The white color blends inconspicuously into most pool cleaner baskets. Compatibility is extensive, covering over 25 Dolphin and Maytronics models, which adds significant value for households with multiple cleaners or future upgrades.
One potential drawback is that the ultra-fine mesh may clog faster than coarser filters, especially in heavily debris-laden pools. This means more frequent cleaning sessions, but the ease of rinsing offsets this inconvenience. Additionally, while compatibility is broad, it is not universal, so buyers should verify their specific model before ordering. The initial fit on some cleaner baskets might feel snug, but this ensures a secure seal.
Overall, the Henkgo ultra-fine filter panels offer an excellent balance of performance, durability, and affordability. They deliver professional-grade filtration at a fraction of the OEM cost. For Dolphin pool cleaner owners seeking clearer water and less maintenance, these filters are a smart investment. The simple installation and reusable design make them a practical choice for any pool season.
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: How to Choose the Right Robotic Pool Cleaner Filter Cartridge
1. Compatibility with Your Pool Cleaner Model
Not all filter cartridges fit every robotic pool cleaner. Before purchasing, confirm that the filter is designed for your specific model. For example, the RCX70101PAK2 works with Hayward SharkVac and TigerShark series, while the 9991467-R4 is compatible with many Dolphin units. Check the product description carefully to avoid mismatches.
For a broader look at compatible options, see our article on top replacement filters for pool robots.
2. Filtration Efficiency: Ultra-Fine vs. Standard
Ultra-fine pleated filter panels, like those from Poolzilla and Funmit, capture smaller particles such as sand, silt, and fine debris. Standard mesh filters may miss these tiny particles, leaving cloudy water. For crystal clear pools, choose an ultra-fine cartridge with a dense pleated design.
We compared several ultra-fine options in our ultra-fine filter basket review.
3. Build Quality and Durability
A durable filter cartridge withstands regular cleaning and pool chemicals. Look for heavy-duty ABS plastic frames and reinforced PET fiber material. Brands like SUNRRA and KTWT emphasize sturdy construction that can last two to three years with proper care. Avoid flimsy filters that warp or rip quickly.
4. Ease of Cleaning and Maintenance
Most pleated filter cartridges are washable and reusable. A simple rinse with a garden hose every four to six weeks restores performance. Numbered panels, as seen in the Henkgo and CLLOMAGY filters, simplify installation and removal. Consider how easy it is to clean when choosing a replacement.
Learn more about maintenance in our pool robot filter guide.
Final Thoughts
After reviewing seven top robotic pool cleaner filter cartridges, we recommend the M400 Ultra Fine Cartridge Filter Replacement from Funmit for Dolphin owners who demand high filtration and durability, and the SUNRRA Ultra Fine Filter Compatible for Hayward and TigerShark users seeking a long-lasting, efficient pack. Both options deliver excellent value and performance for 2026.
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Frequently Asked Questions
How often should I replace my robotic pool cleaner filter cartridge?
Most manufacturers recommend replacing the filter cartridge every one to two years, depending on usage and water conditions. Rinse it every four to six weeks to prolong its lifespan. If you notice reduced suction or debris bypass, it is time for a new cartridge.
Can I wash and reuse robotic pool cleaner filter cartridges?
Yes, most pleated filter cartridges are designed to be cleaned and reused. Simply remove the panels and spray them with a garden hose to dislodge trapped dirt and debris. Avoid using harsh chemicals that could damage the filter material.
Are all robotic pool cleaner filter cartridges universal?
No, filter cartridges are not universal. Each brand and model requires a specific shape, size, and mounting system. Always check your pool cleaner manual or look up the part number (e.g., RCX70101 or 9991467) to ensure compatibility before ordering.
Which filter cartridge is best for capturing fine debris?
Ultra-fine pleated filter panels, like those from Poolzilla and Henkgo, are best for capturing small particles such as sand, silt, and algae. These filters have a tighter weave that traps debris standard mesh filters miss, leaving your pool water sparkling clear.
For a deeper dive into fine filtration, see our ultra-fine filter review.
