If you deal with fine debris — algae dust, pollen, silt, or fine sand — then yes, NanoFilters are worth it. They capture particles down to a few microns that standard cartridges let flow right back into the pool. If you only pick up large leaves and twigs, a standard or coarse filter is fine.
What NanoFilters do
NanoFilters™ are ultra-fine filter media that trap microscopic particles standard filters can’t hold — down to a few microns. That’s the difference between water that looks clean and water that’s actually clear, with no lingering haze from suspended dust and algae. Our experts consider them one of the most impactful and overlooked upgrades on any robot.
Get them if you have…
- Recurring algae or a persistent green/cloudy tint.
- Heavy pollen in spring or lots of fine dust and sand.
- A robot that seems to "stir up" fines rather than remove them.
- Sandy or dusty surroundings, or a nearby construction/landscaping.
When standard filters are fine
If your only debris is big leaves and twigs, a coarse basket or standard cartridge is plenty — you may even want the coarser media so it doesn’t clog. Many owners keep both and swap seasonally.
How to get them
Many premium Dolphins include NanoFilters; on models like the Escape and Cayman they’re an inexpensive add-on. See which filter to use for your debris, or shop robots that ship with fine filtration on our robotic pool cleaners page.
