Your robotic pool cleaner works hard all season, but its filter cartridges are the unsung heroes that trap dirt, leaves, and debris. When those cartridges wear out, your pool’s clarity suffers, and the robot’s efficiency drops. Whether you own a Hayward SharkVac, a Dolphin Nautilus, or a TigerShark, finding the right replacement filters is essential for crystal-clear water. In this guide, we review the best robotic pool cleaner filter cartridges for 2026, covering seven top-rated options that balance durability, filtration power, and value.
If you are looking for filters for specific models, check out our dedicated guides on Dolphin Liberty replacement filters and Dolphin Escape replacement filters for tailored recommendations.
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: What to Look for in Robotic Pool Cleaner Filter Cartridges
Compatibility with Your Cleaner Model
Not all filters fit every robot. Always check the part number and model compatibility before purchasing. Many brands, like our replacement filters page, list compatible models clearly. For example, the 4 Pack for Hayward Sharkvac Filters RCX70101PAK2 works with TigerShark and AquaVac series, while the Poolzilla Ultra-Fine Filters fit Dolphin models like Nautilus CC Plus and M400. Mismatched filters can cause poor suction or damage.
Filtration Efficiency and Material
Pleated ultra-fine filters capture smaller particles than standard mesh. Look for diamond-weave PET fiber or multi-layered designs that trap sand, leaves, and fine silt. The Henkgo 9991467-R4 panels use pleated material for high efficiency, while the SUNRRA filter boasts a heavy-duty ABS frame that resists tearing. Rinsable and reusable filters save money over time.
Build Quality and Longevity
A sturdy frame prevents warping under water pressure. ABS plastic frames, as seen in the Funmit M400 filter and the KTWT RCX70101 cartridge, offer durability that can last two to three years with proper care. Avoid flimsy frames that may crack or lose shape after repeated cleaning.
Ease of Cleaning and Maintenance
Filters that pop out easily and can be hosed off simplify upkeep. The CLLOMAGY 9991467-R4 panels are numbered for easy installation, and the Poolzilla filter recommends a weekly rinse. For best performance, clean your cartridges every four to six weeks. For more tips, see our dolphin quantum ultra fine filters.
Final Thoughts
Choosing the right filter cartridges keeps your robotic cleaner running smoothly and your pool sparkling. For Hayward and TigerShark owners, the 4 Pack for Hayward Sharkvac Filters RCX70101PAK2 offers a high 4.9 rating and diamond-grid PET fiber that traps fine debris. If you have a Dolphin Nautilus or M-series, the Poolzilla Pool Cleaner Ultra-Fine Filters deliver exceptional value with pleated panels that capture even the smallest particles. Both options are easy to clean and built to last, ensuring your investment in a robotic pool cleaner pays off all season.
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Frequently Asked Questions
How often should I replace robotic pool cleaner filter cartridges?
With proper rinsing every four to six weeks, most filters last one to two years. Replace them when the material becomes frayed, torn, or when you notice reduced suction and cloudiness in the pool.
Can I use generic filters in my Dolphin or Hayward cleaner?
Yes, as long as they match the part number and dimensions. Many third-party brands like Funmit and Poolzilla offer compatible filters that meet or exceed OEM performance. Always verify compatibility with your specific model.
What is the difference between standard and ultra-fine filter panels?
Ultra-fine pleated panels capture particles as small as 20 microns, including fine sand and algae. Standard mesh filters let smaller debris pass through. For the clearest water, choose ultra-fine replacements, especially if you have a high-traffic pool or live in a dusty area.
How do I clean my robotic pool cleaner filters without damaging them?
Remove the filters and spray them with a garden hose from the inside out. Avoid using a pressure washer or scrubbing with a brush, as that can tear the pleats. For stubborn debris, soak in a mild vinegar solution. For more tips, check our guide to high-end AIPER pool cleaners.
