Dolphin Proteus DX5i Robotic Pool Cleaner
Pools over 33 ft — The most-reviewed corded robot in the $1,100–$1,300 band — Wi-Fi scheduling, active waterline scrubbing and floor-plus-wall cleaning on in-ground pools up to 50 ft, for about $1,299; owners rate it a middling 4.0★ and the fine filters cost extra
Contender — The Best Corded Robotic Pool Cleaners of 2026
Specs
| Model | Proteus DX5i |
| Power | Corded (no battery) |
| Cleans | Floor, walls + waterline scrub |
| Runtime | Corded — 2 hr cycle |
| Cord | Length not published |
| Pool size | In-ground up to 50 ft |
| Filtration | Top-load basket; fine filters sold separately |
| Rating basis | One model · global base |
| Owner rating | 4.0★ / 257 |
| Warranty | 2 years |
| Replacement filters | S2 platform and the dearest of the three: ultra-fine panels $124.99. A fine basket assembly ($154.99) and a super ultra-fine kit ($169.99) both read out of stock. Maytronics publishes no micron figure for any tier. |
Filtration is rated in microns (µm — millionths of a meter): the smallest particle the filter reliably traps, so a lower number is a finer filter. A human hair is ~70 µm; ultra-fine (~3–10 µm) catches the silt and dead algae that make water hazy. "µm not published" means the maker states no number — which is information in itself.
Pros
- 18% of its 257 ratings are one or two stars, against the Polaris 9450 Sport's 22% — and its critical reviews are mostly about cleaning, not machines dying (read 2026-10-26)
- Active waterline scrubbing plus floor and wall climbing, rated for in-ground pools up to 50 ft in length
- Wi-Fi app scheduling, and a straightforward 2-hour cycle rather than an unpublished timer
Cons
- Owners rate it 4.0★ — the lowest score of the corded machines we card apart from the Nautilus CC Plus, and the complaints are about cleaning quality rather than one-off faults
- The fine filters are not in the box. Multiple owners report buying them separately after the fact, which is a real add-on cost on a $1,299 robot
- The cable tangles — an owner who moved up from a Nautilus says it never happened on the older machine, and this one has no tangle-reducing swivel published
- Waterline scrubbing can't be run on its own; it happens randomly inside the regular 2-hour cycle, so you can't target the tile line
It wanders, and it does not pick up leaves. On coverage: "it tends to wander aimlessly around"; "leaves are a major problem"; "disappointed in performance — I ordered this particular robotic pool cleaner because it had the large ba[sket]". On value, repeatedly: "too pricey for what you get", "not worth the cost vs the performance". Two owners upgrading from older Dolphins or an Aquabot report the newer unit is worse than the machine it replaced, and two more had it fail immediately — "brand new, and didn't work", "didn't work out of the box".
10 critical cards read on page 1 of 258 ratings; poor coverage or wandering appears in 4 independent reviews, value complaints in 3, dead on arrival in 2, and a worse-than-the-old-model comparison in 2. 10/10 Verified Purchase, 0 Vine. · critical reviews read August 2026
“So far this pool cleaner works for me. Nice connection through Wi-Fi Unfortunately it sold without fine filters. But no biggy, I purchased filters on Amazon.”— dimelka, Amazon · Verified owner
FAQ
Who is the Dolphin Proteus DX5i Robotic Pool Cleaner for?
Your in-ground pool is longer than 33 ft — rated to 50 ft, with an active waterline brush, Wi-Fi scheduling and the better failure record of the corded robots rated past 33 ft; expect to buy fine filters separately.
What do owners say about the Dolphin Proteus DX5i Robotic Pool Cleaner?
4.0★ across 257 owner ratings (Amazon, read 2026-10-26 · global base). What owners complain about: It wanders, and it does not pick up leaves. On coverage: "it tends to wander aimlessly around"; "leaves are a major problem"; "disappointed in performance — I ordered this particular robotic pool cleaner because it had the large ba[sket]". On value, repeatedly: "too pricey for what you get", "not worth the cost vs the performance". Two owners upgrading from older Dolphins or an Aquabot report the newer unit is worse than the machine it replaced, and two more had it fail immediately — "brand new, and didn't work", "didn't work out of the box".
What is the warranty on the Dolphin Proteus DX5i Robotic Pool Cleaner?
2 years
Record
- — Price read 2026-10-02 from the live Amazon offer (Creators API): $1,299, no deal flag; was $1,199. Published at read time per the 2026-09-15 rule, ahead of Prime Big Deal Days.
Warranty — and what changes if you buy it on Amazon
2 years · you are buying this on Amazon
Read it yourself: Maytronics warranty document · we read it . Terms change without announcement, so treat this as a dated snapshot. How warranty works by buy path →
✓ Safety: no active recall — No active CPSC recall found — saferproducts.gov queried 2026-08-13 for Maytronics/Dolphin pool cleaners, zero records returned.
Size your pool first → ·All pool gear →
Data last verified: 2026-10-26. Ratings are real, dated reads — never scraped or invented. Full methodology and monetization disclosure: how we test.