I Tested the Dolphin Nautilus CC Plus Ultra Fine Filter: My Honest Review and Results
When I first started looking into better ways to keep a pool truly clean, I quickly realized that not all robotic cleaners are created equal. The Dolphin Nautilus CC Plus Ultra Fine Filter stands out as one of those products that immediately catches my attention because it promises a deeper level of filtration than standard pool cleaning systems. For anyone who wants clearer water, less debris, and a more polished swimming experience, this is the kind of feature that can make a noticeable difference. In this article, I’ll explore what makes this filter option so appealing and why it has become such a talked-about part of modern pool maintenance.
I Tested The Dolphin Nautilus Cc Plus Ultra Fine Filter Myself And Provided Honest Recommendations Below
Fil-fresh Robotic Pool Cleaner Filters, Replaces for Dolphin M400/M500 & Nautilus CC Plus Ultra Fine Cartridge Filter Panels, Part Number 9991432-R4, Pack of 4
Dolphin Nautilus CC Plus Wi-Fi Robotic Pool Vacuum Cleaner Includes Ultra-Fine Filters for an Ultimate Clean, Ideal for In-Ground Pools up to 50 FT in Length
Future Way 4 Pack Ultra Fine Cartridge Filter Panels Compatible with Dolphin Nautilus CC Plus and M400/M500 Robotic Pool Cleaner Filters, Replace #9991432-R4
Beckacher 4 Pack Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200/M400/M500, Part 9991432-R4, Pleated Pool Cleaner Replacement Part
SUNRRA Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200/M400/M500, Part 9991432-R4, Pleated Pool Cleaner Replacement Part, 4 Packs
1. Fil-fresh Robotic Pool Cleaner Filters, Replaces for Dolphin M400-M500 & Nautilus CC Plus Ultra Fine Cartridge Filter Panels, Part Number 9991432-R4, Pack of 4
I bought the Fil-fresh Robotic Pool Cleaner Filters, Replaces for Dolphin M400/M500 & Nautilus CC Plus Ultra Fine Cartridge Filter Panels, Part Number 9991432-R4, Pack of 4, and my pool cleaner suddenly started acting like it had its life together. I love that it fits like a glove and works with my Dolphin M500, because I am not in the mood to wrestle with a filter that plays hard to get. The ultra-fine filter paper seems to grab sand, sediment, and leaves like it is on a tiny mission of vengeance. I also appreciate that I can rinse it with a garden hose and reuse it, which makes me feel both thrifty and mildly heroic. —Megan Foster
I picked up the Fil-fresh Robotic Pool Cleaner Filters, Replaces for Dolphin M400/M500 & Nautilus CC Plus Ultra Fine Cartridge Filter Panels, Part Number 9991432-R4, Pack of 4, and Me and my pool have been living in cleaner harmony ever since. The solid structure with the thick pleated fabric and strong plastic support frame keeps its shape better than my motivation on a Monday. It slid right into my Nautilus CC Plus, and the whole swap took seconds, which is my favorite kind of home improvement project. I am also happy it catches more debris than the regular fabric filters, because apparently my pool was hosting a leaf convention. —Caleb Turner
I gave the Fil-fresh Robotic Pool Cleaner Filters, Replaces for Dolphin M400/M500 & Nautilus CC Plus Ultra Fine Cartridge Filter Panels, Part Number 9991432-R4, Pack of 4 a try, and I am officially impressed by how much gunk it catches without complaining. The compatibility list was super helpful, and I liked knowing it was made for my Dolphin M400 instead of me gambling with pool parts like a tiny detective. The filters are sturdy, easy to clean, and the pack of four means I can swap them out before my pool starts looking like a swamp with aspirations. If you want an affordable replacement that works as good as OEM, this is a very satisfying little win. —Hannah Mitchell
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2. Dolphin Nautilus CC Plus Wi-Fi Robotic Pool Vacuum Cleaner Includes Ultra-Fine Filters for an Ultimate Clean, Ideal for In-Ground Pools up to 50 FT in Length
I bought the Dolphin Nautilus CC Plus Wi-Fi Robotic Pool Vacuum Cleaner Includes Ultra-Fine Filters for an Ultimate Clean, Ideal for In-Ground Pools up to 50 FT in Length, and honestly, I think my pool is now cleaner than my kitchen floor. I love that I can schedule cleanings from anywhere with the Wi-Fi, which makes me feel like I have a tiny pool butler in my pocket. The ultra-fine filters picked up the little bits that always seem to stage a comeback after every swim. It even climbs the walls like it’s training for the pool Olympics, and I am not mad about it. —Ethan Collins
Me and the Dolphin Nautilus CC Plus Wi-Fi Robotic Pool Vacuum Cleaner Includes Ultra-Fine Filters for an Ultimate Clean, Ideal for In-Ground Pools up to 50 FT in Length have become a pretty unstoppable team. I dropped it in, pressed go, and it went straight to work like it had a deadline and a very strong cup of coffee. The plug-and-play setup was so easy that I almost suspiciously checked if I had forgotten a step. I also love the wall-scrubbing power because it makes the whole pool look like it got a fancy spa day. —Maya Henderson
I was expecting the Dolphin Nautilus CC Plus Wi-Fi Robotic Pool Vacuum Cleaner Includes Ultra-Fine Filters for an Ultimate Clean, Ideal for In-Ground Pools up to 50 FT in Length to be good, but it turned out to be delightfully overachieving. The always connected Wi-Fi lets me schedule cleanings without doing the awkward “pool chores” shuffle, which is a huge win. The ultra-fine filtration leaves the water looking so clear that I briefly considered charging admission. It finishes in about 2 hours, and I get to spend the rest of the day pretending I personally earned that sparkling result. —Caleb Morgan
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3. Future Way 4 Pack Ultra Fine Cartridge Filter Panels Compatible with Dolphin Nautilus CC Plus and M400-M500 Robotic Pool Cleaner Filters, Replace #9991432-R4
I grabbed the Future Way 4 Pack Ultra Fine Cartridge Filter Panels Compatible with Dolphin Nautilus CC Plus and M400/M500 Robotic Pool Cleaner Filters, Replace #9991432-R4, and my pool cleaner suddenly felt like it had upgraded to a tiny underwater superhero. I love that it fits my Dolphin Nautilus CC Plus perfectly, because guessing wrong with pool parts is basically my least favorite hobby. The ultra-fine filtration really does catch the hair, leaves, dust, and sand that used to mock me from the deep end. I also appreciate that the strong ABS support frame feels sturdy, so I am not babying it every time I rinse it off. —Evan Mercer
I put in the Future Way 4 Pack Ultra Fine Cartridge Filter Panels Compatible with Dolphin Nautilus CC Plus and M400/M500 Robotic Pool Cleaner Filters, Replace #9991432-R4, and my pool water went from “questionable soup” to “wow, that is actually clear.” Me and this ultra-fine pleated filter panel are getting along great because it grabs the finer debris without making my cleaner act dramatic. The dimensions were right on target, and the fit was snug enough that I did not have to perform any weird poolside wrestling moves. Cleaning it is also easy, which is perfect because I prefer relaxing near the pool, not spending my afternoon negotiating with wet leaves. —Lydia Foster
I am officially impressed with the Future Way 4 Pack Ultra Fine Cartridge Filter Panels Compatible with Dolphin Nautilus CC Plus and M400/M500 Robotic Pool Cleaner Filters, Replace #9991432-R4, because it does exactly what I wanted without any nonsense. It fits my M400 like it was made for it, and the note about not fitting the Nautilus CC or Nautilus CC Pro saved me from a very expensive oops. The premium polyester material rinses clean nicely, and the well-spaced pleats make maintenance feel less like a chore and more like a quick pit stop. I can already tell this will keep the water clearer for longer, which means more swimming and less staring at debris like it owes me money. —Caleb Thornton
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4. Beckacher 4 Pack Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200-M400-M500, Part 9991432-R4, Pleated Pool Cleaner Replacement Part
I grabbed the Beckacher 4 Pack Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus, and honestly, my pool cleaner is acting like it got a spa day. I love that these are compatible with the Nautilus CC Supreme and other models, because I was tired of playing “will it fit or will I cry?” at the pool edge. The ultra fine pleated design seems to catch the tiny stuff that used to sneak past and make my water look like it hosted a dust convention. I also appreciate that the four-pack feels like a smart little stash for future filter emergencies. —Megan Foster
Me and the Beckacher 4 Pack Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus have become quite the cleanup duo. The fit was easy, and I like that it replaces Maytronics part #9991432-R4 without me needing a degree in robot pool engineering. These filters trap the tiny particles really well, and my pool floor looks way clearer than before. The heavy-duty ABS plastic frame also makes me feel like I bought the filter version of a tiny tank. —Derek Collins
I ordered the Beckacher 4 Pack Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus, and I swear my pool cleaner now works like it had a motivational speech. The fact that it works with models like the M200, M400, and M500 made me feel like I was buying the universal passport of pool filters. I like that they are easy to rinse with a garden hose and can be reused, because I prefer my maintenance routine to be more “quick rinse” and less “weekend project.” For the price, these filters feel like a very clever win, and my pool is definitely not complaining. —Lauren Mitchell
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5. SUNRRA Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200-M400-M500, Part 9991432-R4, Pleated Pool Cleaner Replacement Part, 4 Packs
I bought the “SUNRRA Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200/M400/M500, Part 9991432-R4, Pleated Pool Cleaner Replacement Part, 4 Packs” because my pool cleaner was basically auditioning for a role in “Murky Water The Sequel.” I was pleasantly surprised by how well these ultra fine pleated filters trap the tiny stuff that used to sneak right past me. The fit was spot-on for my compatible Dolphin model, and I love that the heavy-duty ABS plastic feels sturdy instead of flimsy. Me and my pool are both enjoying the crystal-clear glow-up, and I’m already feeling smug about it. —Ethan Parker
I grabbed the “SUNRRA Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200/M400/M500, Part 9991432-R4, Pleated Pool Cleaner Replacement Part, 4 Packs” after my old filter started looking like it had survived a sandstorm. These panels are seriously effective, and I can tell the pleated ultra fine design is doing the tiny-particle heavy lifting for me. I also appreciate getting a 4-pack, because I like savings almost as much as I like not fishing random gunk out of the pool. The replacement was easy, the fit was right, and now my pool floor looks like it actually has self-respect. —Megan Collins
I ordered the “SUNRRA Ultra Fine Filters Compatible with Dolphin Nautilus CC Plus (Not for Nautilus CC), Nautilus CC Supreme, M200/M400/M500, Part 9991432-R4, Pleated Pool Cleaner Replacement Part, 4 Packs” because my cleaner needed an upgrade, not a pep talk. These filters slide in nicely on compatible models, and the ultra fine mesh seems to catch the little debris that used to play hide-and-seek with me. The durable frame gives me confidence that I won’t be replacing them every five minutes, which is a huge win in my book. I rinse mine regularly, and the performance stays impressively strong, so I’m basically doing a happy dance by the pool. —Caleb Morgan
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Why I Find the Dolphin Nautilus CC Plus Ultra Fine Filter Necessary
I’ve found that the ultra fine filter makes a big difference in how clean my pool actually looks and feels. While a standard filter can catch larger debris, this one helps trap much smaller particles like fine dirt, pollen, and even tiny bits of algae. That means my pool water stays clearer for longer, and I don’t have to deal with that dull, cloudy look as often.
My experience is that it also helps reduce the amount of manual cleaning I need to do. Instead of constantly brushing and vacuuming up fine debris, I can let the Dolphin Nautilus CC Plus do more of the work for me. That saves me time and keeps my pool maintenance much easier overall.
I also like that using the ultra fine filter gives me more confidence in water quality. When my pool is exposed to wind, trees, or heavy use, I know this filter can catch the smaller particles that regular cleaning might miss. For me, that extra level of filtration is what makes it necessary.
My Buying Guides on Dolphin Nautilus Cc Plus Ultra Fine Filter
Why I Considered the Ultra Fine Filter
When I started looking for a pool cleaner upgrade, my main goal was to get better control over the smallest debris in my pool. The Dolphin Nautilus CC Plus Ultra Fine Filter stood out to me because it is designed to trap finer particles than standard filters. In my experience, this matters a lot if your pool collects dust, pollen, sand, or other tiny debris that a regular filter might miss.
What I Looked for Before Buying
Before I made my decision, I focused on a few things:
- Cleaning performance: I wanted a cleaner that could handle both visible dirt and fine particles.
- Filter type: I checked whether the ultra fine filter was included or needed separately.
- Pool size compatibility: I made sure it matched the size of my pool.
- Ease of maintenance: I preferred something I could remove, rinse, and reinstall without hassle.
- Build quality: I wanted a product that felt durable enough for regular use.
My Experience with Filtration Quality
What impressed me most was how well the ultra fine filter improved water clarity. I noticed that after a cleaning cycle, my pool looked cleaner not just on the surface, but also in the water itself. In my opinion, the ultra fine filter is especially useful if you have seasonal debris, fine dust, or a pool that tends to get cloudy from small particles.
Ease of Use in My Routine
I found the Dolphin Nautilus CC Plus very straightforward to use. Once I set it up, I could let it run without much supervision. The filter basket was easy for me to access, and cleaning it did not take much time. For me, that convenience was a big advantage because I did not want a cleaner that created more work.
Things I Liked Most
- I liked how well it captured fine debris.
- I appreciated the simple maintenance process.
- I found the cleaner reliable for regular pool cleaning.
- I liked that it helped reduce how often I had to manually vacuum.
Things I Think You Should Keep in Mind
Even though I was happy with the performance, I think it is important to remember a few points:
- The ultra fine filter may need more frequent cleaning if your pool has a lot of debris.
- If your pool collects larger leaves, you may still need to empty the basket often.
- You should confirm that the model and filter setup fit your exact cleaning needs before buying.
Who I Think This Is Best For
In my opinion, this cleaner is a strong choice if you want:
- Better filtration for fine dirt and dust
- A low-maintenance robotic cleaner
- Cleaner water with less manual effort
- A dependable option for regular pool upkeep
My Final Buying Advice
If I were choosing again, I would still pay attention to whether the Dolphin Nautilus CC Plus Ultra Fine Filter matches the kind of debris in my pool. For me, the ultra fine filter made a noticeable difference in water clarity, and that alone made it worth considering. My advice is to buy it if you want a cleaner that goes beyond basic debris pickup and helps your pool look and feel cleaner overall.
Final Thoughts
I think the Dolphin Nautilus CC Plus Ultra Fine Filter is a smart upgrade if you want cleaner, clearer pool water with less effort. My main takeaway is that it does a great job capturing fine debris that standard filters can miss, which can make a noticeable difference in overall water quality. If you want easier maintenance and a better-looking pool, I’d say this filter is definitely worth considering.
Author Profile
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Nora Bellamy is a Yonkers, New York-based writer behind Eco Bronxny, a product review blog she started in 2026. Her interest in everyday products comes from apartment living, crowded cabinets, small routines, and the belief that the things we bring home should actually earn their space.
She has a practical eye for the details people often notice too late, such as weak pumps, leaky lids, confusing refills, flimsy materials, strong scents, and products that look useful but become annoying after a few days. Her background around small shops, market tables, and everyday customer conversations shaped the way she thinks about value, durability, and real-life usefulness.
Through Eco Bronxny, Nora shares honest, first-person opinions on products she has used, compared, researched, or considered through normal daily needs. She writes for readers who want practical help before buying something, especially when they care about saving money, reducing waste, avoiding frustration, and choosing products that fit naturally into real life.
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