Quick Answer: The best pool cleaner for algae in 2026 is the Dolphin Nautilus CC Plus ($799) — it actively scrubs algae off the floor and walls with a rotating brush and traps the fine dead algae with an ultra-fine filter rated down to about 2 microns, which is exactly what a standard sand filter (20–40 microns) misses. For a heavily greened pool, step up to the Beatbot AquaSense 2 ($1,299), which adds dedicated waterline scrubbing where algae clings hardest, or the Dolphin Premier (~$1,199) with its swappable ultra-fine cartridge. Just remember: no cleaner kills algae — chlorine and algaecide do that. The cleaner does the mechanical half: scrub the surfaces so your chemicals can work, then vacuum the dead algae out.
Clearing algae is a two-part job, and most people only do one half. Chlorine, shock, and algaecide kill the algae — but a green pool doesn’t turn clear until you physically scrub the slime off the surfaces and vacuum the dead algae, which is so fine it drifts through a normal filter and clouds the water right back up. That’s the job a good algae cleaner does. This guide ranks the robotic cleaners that scrub hardest and filter finest in 2026, and explains how to use one to actually clear a green pool.
Best pool cleaners for algae at a glance
| Model | Best for | Scrubbing | Filter | Price | Rating |
|---|---|---|---|---|---|
| Dolphin Nautilus CC Plus | Best overall | Active brush | Ultra-fine (~2 micron) | ~$799 | ★★★★★ |
| Beatbot AquaSense 2 | Waterline algae | Dual brush + waterline | Fine, large basket | ~$1,299 | ★★★★½ |
| Dolphin Premier | Fine dead algae | Dual active brush | Swappable ultra-fine cartridge | ~$1,199 | ★★★★½ |
| Aiper Scuba S1 | Cordless / above-ground | Active brush | Fine cartridge | ~$699 | ★★★★☆ |
| WYBOT C1 | Budget cordless | Brush roller | Fine mesh | ~$399 | ★★★★☆ |
1. Dolphin Nautilus CC Plus — Best Overall
Dolphin Nautilus CC Plus
- Active scrubbing brush breaks algae off floors and walls, not just vacuuming.
- Ultra-fine filter — Maytronics rates it to capture particles down to about 2 microns — traps fine dead algae a sand filter misses.
- Climbs and scrubs walls, where algae blooms cling first.
- Runs on its own motor, independent of your pump and filter system.
The Nautilus CC Plus is the cleaner most people fighting algae should buy because it does both mechanical jobs well without a premium price. Its rotating scrub brush actively lifts algae off the pool floor and walls — living algae is slippery and bonded to the surface, so scrubbing, not just suction, is what removes it. Just as important, its ultra-fine filter cartridge catches the tiny dead algae particles that make a shocked pool go cloudy instead of clear. Where a standard sand filter only traps particles down to roughly 20–40 microns, Maytronics rates the CC Plus ultra-fine media down to about 2 microns, which is the difference between vacuuming algae out and simply stirring it back into the water. For the pillar comparison across every cleaner type, see our best robotic pool cleaner guide.
2. Beatbot AquaSense 2 — Best for Waterline Algae
Beatbot AquaSense 2
- Dedicated waterline-scrubbing mode targets the tile line where algae clings hardest.
- Dual brushes plus strong suction for floors, walls, and the water surface.
- Large fine-mesh basket handles a full bloom's worth of dead algae per cycle.
- App control to schedule repeat passes as the pool clears.
Algae almost always shows up first at the waterline — the band of tile or liner right at the surface — because that’s where sunlight, oils, and still water meet. The AquaSense 2 is the pick if that’s your problem: it has a dedicated waterline mode that parks and scrubs along the tile line, plus surface skimming and floor/wall cleaning in one machine. It’s expensive, but for a recurring waterline algae ring it does a job the cheaper robots can’t. See how it stacks up in our Beatbot vs Dolphin comparison.
3. Dolphin Premier — Best for Fine Dead Algae
Dolphin Premier
- Multi-media filtration: swap in an ultra-fine cartridge specifically for dead-algae dust.
- Dual active scrubbing brushes for maximum grip on slick surfaces.
- Oversized debris chamber for heavy loads.
- Handles fine silt, sand, and algae that clog other cleaners.
The Premier’s edge for algae is its swappable filter media — you can run the ultra-fine cartridge when you’re clearing a bloom and the standard basket for everyday leaves and grit. That flexibility matters because ultra-fine media clogs faster, so you only want it on when you’re specifically chasing dead-algae dust. With dual scrubbing brushes and a large chamber, it’s the choice for pools that green up repeatedly or hold a lot of fine sediment. It’s also a strong pick for soft-sided pools — see our best pool cleaner for vinyl pools guide.
4. Aiper Scuba S1 — Best Cordless
Aiper Scuba S1
- Cordless — no float cable to tangle, easy to move between pools.
- Active brush and fine cartridge for floor and lower-wall algae.
- Ideal for above-ground and mid-size inground pools.
- Simple to drop in, run, and lift out for basket cleaning.
If you want algae scrubbing without a corded robot, the cordless Scuba S1 is the value pick. It scrubs and vacuums the floor and lower walls with a fine cartridge, and being cordless it’s genuinely easy to reposition mid-clean to hit an algae patch. It won’t do the waterline like the Beatbot, but for above-ground and mid-size pools it clears floor algae well below the premium price. More cordless options in our best cordless robotic pool cleaner roundup.
5. WYBOT C1 — Best Budget
WYBOT C1
- Lowest-cost cordless robot that still scrubs and vacuums.
- Fine mesh filter for everyday debris and lighter algae.
- Best for small-to-mid above-ground pools.
- Light and easy to handle for frequent runs.
For light or occasional algae in a smaller pool, the WYBOT C1 does the essential job — scrub and vacuum — at the lowest price here. Its filter isn’t as fine as the Dolphin ultra-fine media, so a heavy bloom will need more passes, but for keeping algae from taking hold in the first place it’s an affordable workhorse. Compare it with other value picks in our best budget robotic pool cleaner guide.
Why a robotic cleaner is the right tool for algae
Algae is the one problem where cleaner type matters most. Here’s why robotic beats suction and pressure for a green pool:
- It scrubs. Living algae is bonded to the surface; suction alone slides over it. A robotic cleaner’s active brush mechanically breaks the film loose so chlorine can reach and kill it. Consumer Reports notes that robotic cleaners scrub floors and walls that suction and pressure models simply pass over.
- It filters fine. Dead algae particles are often just a few microns across. A typical sand filter only traps particles down to about 20–40 microns, so fine dead algae passes straight through and re-clouds the water. An ultra-fine robotic filter (~2 microns on the Dolphin CC Plus) captures it instead.
- It’s independent. A robot holds debris in its own basket and runs on its own motor, so it isn’t dumping algae into your pump basket and filter, which would clog them mid-bloom exactly when you need flow most.
How to actually clear a green pool with your cleaner
A cleaner is half the job. This is the sequence that works:
- Balance and shock. The CDC recommends keeping free chlorine at 1–3 ppm and pH between 7.2 and 7.8 to control algae; for an active bloom, shock well above that and add an algaecide per the label. Chemistry kills the algae — the cleaner cannot.
- Brush first. Manually brush walls, steps, and the floor to knock algae loose and expose it to chlorine. This one step dramatically speeds up the kill.
- Run the cleaner in passes. Fit the ultra-fine filter, then run the robot, empty the basket, and run it again. Dead algae is fine enough that a single pass won’t get it all — plan on two or three over a day or two.
- Keep the filter running. Run your main pump/filter alongside the robot; between them they’ll pull the water from green to cloudy to clear.
For the full type-by-type breakdown of robotic, suction, and pressure cleaners, see our best automatic pool cleaner explainer.