By Justin D. • March 17th, 2024
When shopping for a pool robot, you may notice a variety of different filters, from baskets to cartridges. Most pool robots only include 1 filter option – the standard fine filter. What the pool robot companies fail to tell you is that the standard filters only stop larger debris and allow the smaller debris to pass right through.
This mesh material is great at capturing larger sized particles, but fails to capture smaller material such as sand, dirt, algae and other particulate that can cloud up your pool’s water. But there is a solution to this: NanoFilters.
I've tested all of the best robotic pool cleaners of 2025, and this filters are a MUST-HAVE for any pool, as it kept the water clear and clean in my testing.
What are NanoFilters?
These large surface area filters capture and remove much more than the standard filters. NanoFilters are able to stop and remove dirt, debris, sand, algae and fine particles What would have continously recirculated in your water, now gets pulled out and removed.
This allows your robot to now be a secondary filter, rather than just a simple vacuume. The NanoFilters unlock the pool robot’s full potential and they dramatically improve water quality
Improve Water Clarity
As we get closer to the NanoFilters, you will notice the difference in material. The NanoFilters are made with a pleated material with a much higher surface area. The pore structure is much smaller when compared to the standard mesh filters. This is where NanoFilters shine, it captures more than just large particles, it can also grab hold of the small particles like pet dander, pollen and algae.
As I’m washing the sludge off the Nanofilter, I can't help from thinking about what would have been left behind by lesser filters All of this will lead to reduced turbidity, which will improve water clarity and transparency The ability to eliminate a large amount of contamination before water ever reaches your pool’s primary filter also takes a huge load off of your main circulation system
Which Robots have NanoFilters?
Where can you find NanoFilters? Well to start, if you want a robot that includes NanoFilters look for these units:
Dolphin Quantum
With the largest NanoFilter option at over 400in2, the Dolphin Quantum is the only robot with an Oversized NanoFilter basket. Larger than most baskets from Maytronics, it can capture and clean over 400 square inches of material. Combine with exceptional motors and performance of the Dolphin ProLine, it is quite the robot.
Dolphin Premier
With a NanoFilter cartridge set and oversized Leaf Bag, the Dolphin Premier boasts MultiMedia. It is the only Dolphin with this leaf bag, allowing you to customize every clean. It’s dual commercial grade motors, programmable power supply, and full filter indicator combine to give a stellar clean in any pool. Plus it has a 3 year warranty.
Dolphin Sigma
Finally, the Dolphin Sigma. Maytronics most advanced robot ever not only includes nanofilters, but also utilizes a gyroscope and triple commercial grade motors. Powered by the myDolphin Plus app, you can program and clean the robot from anywhere while setting what days you want Sigma to clean.
Which Robots have NanoFilter capability?
Now, if you want to add NanoFilters, there is an option to add them on for the Dolphin Cayman and Dolphin Escape, allowing you to get a NanoFilter performance on a budget.
Final Verdict
If you want to keep nerding out over your pool, be sure to hit that subscribe button to keep learning how to make pool maintenance way easier. Head on over to thepoolnerd.com to view my comparison page and see all the differences between the many robotic pool cleaners out there. Until then, enjoy that pool and check back soon for more pool maintenance tips and insight.
Your resident pool aficionado.
For over 4+ years, The Pool Nerd has been a leading source in the swimming pool industry. With years of experince owning a swimming pool, our hope here is to guide and help making owning a swimming pool easier.
