Robots That Filter Fine Dust and Algae (50 Microns or Finer)

Cloudy water that the pool filter will not clear is usually particles under 50 microns: fine dust, silt and the first stage of algae. Most robots ship with a 150 to 180 micron basket, which catches sand and leaves and lets all of that straight through. The robots below put a finer layer in the box. Two practical costs come with it: an ultra-fine layer clogs faster, so it needs rinsing after nearly every run, and several makers recommend the coarse basket alone after a storm so the fine one does not blind.

How this list is ordered: Every robot whose in-box filter the maker rates at 50 µm or finer, ordered by that rating and then by price. Optional filters sold separately do not count. 6 of the catalog’s robots qualify. 1 of them is no longer listed by its maker in the US — Aiper Scuba S1 Pro — so this list includes models you cannot currently buy new.

  1. Aiper Scuba S1 robotic pool cleaner

    1Aiper

    ~$500

    Aiper Scuba S1

    Aiper's best-known cordless robot is now its entry model, sold since 2026 as the Scuba S1 (2026 Upgrade): 180 minutes on a standard cycle, a gyroscope for straighter lines than random wandering, a 3.5-litre top-load basket with a 3-micron ultra-fine filter beneath the 180-micron one, and a 50-foot rating.

    Finest filter
    3 µm
    Pool fit
    ~55 ft
  2. Aiper Scuba S3 robotic pool cleaner

    2Aiper

    ~$650

    Aiper Scuba S3

    Aiper's S3 pairs the 3-micron ultra-fine layer with waterline parking for retrieval.

    Finest filter
    3 µm
    Pool fit
    ~55 ft
  3. AiperScuba X1Cordless floor+wall+waterline

    3Aiper

    ~$800

    Aiper Scuba X1

    Aiper's X1 scrubs horizontally up to two inches above the waterline, pulls 6,600 gallons an hour through a five-litre basket and a 3-micron MicroMesh layer, and charges on a wireless dock.

    Finest filter
    3 µm
    Pool fit
    ~55 ftclaims ~66 ft
  4. Aiper Scuba S1 Pro robotic pool cleaner

    4Aiper

    ~$1,200

    Aiper Scuba S1 ProNo longer listed by Aiper

    The S1 Pro adds a 3-micron ultra-fine layer under the 180-micron basket, horizontal waterline scrubbing, the Aiper app and a 66-foot rating to the S1 recipe.

    Finest filter
    3 µm
    Pool fit
    ~55 ftclaims ~66 ft
  5. WYBOT C2 robotic pool cleaner

    5WYBOT

    ~$500

    WYBOT C2

    WYBOT's 2026 C2 puts a 10-micron ultra-fine filter behind its 180-micron cartridges for $500, and returns to the pool edge when it is done.

    Finest filter
    10 µm
    Pool fit
    ~68 ft (floor only)
  6. WYBOT C2 Vision robotic pool cleaner

    6WYBOT

    ~$630

    WYBOT C2 Vision

    A C2 with a camera.

    Finest filter
    10 µm
    Pool fit
    ~68 ft (floor only)

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