You have spent time and money on a robotic pool cleaner, but fine debris like sand, pollen, and silt still settles on the floor. The culprit is often the filter: standard mesh panels miss the tiny particles that cloud your water. This Black Friday, upgrading to ultra-fine filter replacements can solve that problem at a fraction of the cost of a new cleaner. In this guide, we review four top-rated filter panels compatible with leading robotic pool cleaners, helping you choose the right set for a sparkling pool without the hassle.
Whether you own a Dolphin, TigerShark, or a generic robot, these deals are designed to deliver crystal-clear water. For more ways to save on pool maintenance this season, check out our roundup of Wall Climbing Pool Robot Black Friday Deals.
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 Fine Debris Filter for Your Pool Cleaner
Filtration Efficiency: Look for Pleated or Ultra-Fine Media
Not all filter panels are created equal. Standard mesh filters capture leaves and coarse dirt but let fine particles pass through. For true clarity, choose cartridges labeled “ultra-fine” or “pleated.” Pleated filters increase surface area, trapping dust, sand, and even algae spores. The products we reviewed today all feature pleated designs that outperform basic flat panels.
When comparing, pay attention to the micron rating if listed. Lower numbers mean finer filtration. A quality ultra-fine filter will keep your pool water polished without requiring frequent backwashing.
Compatibility: Confirm Your Robot Model Before Buying
Filter panels are not universal. A panel that fits a Dolphin S200 will not work in a TigerShark. Always cross-reference the model list provided by the manufacturer. The Replace Part#9991467-R4, for instance, fits many Dolphin models, while the SUNRRA filter is designed specifically for TigerShark and AquaVac robots. Matching the correct part ensures a snug seal and optimal performance.
For more insights on maintaining your robotic cleaner, read our guide on the best pool robot traction brush to keep your unit moving smoothly.
Durability and Build Quality: ABS Plastic and Reinforced Frames
Cheap filters may warp or tear after a few uses. Look for panels made with heavy-duty ABS plastic frames and reinforced pleats. Premium materials resist deformation under water pressure and can last two to three years with proper care. All four products in this review use sturdy plastic frames, with the Funmit M400 replacement particularly noted for its robust construction.
Rinsing the filters every four to six weeks with a garden hose will extend their life. Avoid harsh chemicals or scrubbing that could damage the media. If your robot struggles with fine debris, also consider upgrading the brushes; our best pool cleaner dual brush article covers top options.
Ease of Maintenance: Numbered Panels and Quick Rinse
Nobody wants a complicated cleaning routine. The best filters pop out easily and rinse clean under a spray nozzle. Some sets, like the Henkgo Replace Part#9991467-R4, are numbered to guide installation order, preventing mix-ups. A simple maintenance schedule keeps your robot running efficiently all season long.
For additional Black Friday savings on pool cleaners themselves, browse our Automatic Above Ground Pool Cleaner Black Friday Deals.
Final Thoughts
This Black Friday, investing in a high-quality ultra-fine filter is the most cost-effective way to banish fine debris from your pool. For Dolphin owners, the Replace Part#9991467-R4 Ultra-Fine Filter Panels offer excellent value and universal compatibility, while the M400 Ultra Fine Cartridge Filter Replacement from Funmit delivers superior build quality for Nautilus CC Plus and similar models. Whichever you choose, your pool will thank you with sparkling, debris-free water all summer long.
Frequently Asked Questions
Can I use ultra-fine filters in any robotic pool cleaner?
Not all robots accept ultra-fine panels. Check your owner’s manual and the filter’s compatibility list. Most Dolphin models work with the filters reviewed here, but brands like TigerShark require specific parts such as the SUNRRA RCX70101PAK2.
How often should I replace my pool cleaner’s fine debris filter?
With proper rinsing every 4 to 6 weeks, a pleated ultra-fine filter can last 2 to 3 years. Replace it sooner if you notice tears or if water clarity declines. This Black Friday is a great time to stock up for 2026.
Are these Black Friday deals really worth it for fine debris removal?
Absolutely. Fine debris like sand and pollen requires a filter with high surface area and small pores. The deals on ultra-fine panels this Black Friday let you upgrade at a discount compared to buying from the original manufacturer, and they often outperform standard replacements.
What is the difference between pleated and standard filter panels?
Pleated panels have accordion-like folds that increase the filter’s surface area, trapping more fine particles without clogging quickly. Standard flat panels are better for large debris. For a crystal-clear pool, pleated ultra-fine filters are the smarter choice. Learn more about maintaining your robot in our best pool cleaner wall climbing brush article.
