Dolphin Proteus DX3 Automatic Robotic Pool Vacuum Cleaner Review
A research-based review of the Dolphin Proteus DX3, a corded Maytronics robot for floors and walls in pools up to 33 ft, with specs, gaps, and rivals.
Updated October 30, 2026
The Dolphin Proteus DX3 automatic robotic pool vacuum cleaner is a corded robot that scrubs pool floors and walls, and Maytronics’ US page for the DX3 rates it for pools up to 33 ft long with a two-year warranty. It fits a small to mid-size pool whose owner wants a light robot that runs a set cycle with no app to learn. It is a poor match for a pool longer than 33 ft, for anyone who wants the tile line scrubbed, and for owners who want the robot to run on a schedule while they are away.
We have not used a DX3. This review draws on three sources: the spec sheet on Maytronics’ US site, the DX3’s Amazon listing, and owner ratings, which feed its BackyardPoolLab Score. The model number on the listing, 99996114-LSB, is the product number on the Maytronics page, and the two sources agree on most points. Where the listing says something the maker does not, we flag it and go with the maker.
This guide is general product information, not repair or electrical safety advice. Follow the manufacturer’s manual for installation and use, have pool electrical work done by a licensed electrician, keep children supervised around water, and stop using any product that sparks, overheats, or has a damaged cord.
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Dolphin Proteus DX3
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At a Glance
Every row comes from the tech specs on Maytronics’ US product page unless it names the Amazon listing.
| Specification | Dolphin Proteus DX3 |
|---|---|
| Maximum pool length | 33 ft (the listing title says the same) |
| Pool classification | In ground and above ground; the listing title mentions in-ground pools only |
| Pool shape | Rectangular, round |
| Cleaning coverage | Floor and walls; waterline scrubbing: No |
| Default cycle time | 2 hours |
| Brush | One standard brush, active brush: Yes |
| Filtration | Fine filter kit, top access; full filter indicator: No |
| Suction rate | 4,000 gph |
| Robot weight | 14.796 lb (the listing rounds it to 14.8 lb) |
| Robot size | About 17.2 in long, 15.8 in wide, 10.3 in high |
| Timer, delay, app, remote | None of the four |
| Anti-tangling swivel | No |
| Electrical rating | Not published on the maker’s US page; listing fields read “AC/DC” and “18 volts” |
| Warranty | 2 years |
What We Like
- A two-year warranty. Maytronics lists 2 years for the DX3 on its US page.
- A light robot. Maytronics lists 14.796 lb and highlights the DX3 as “Lightweight for easy lifting and handling.”
- An active brush on floor and walls. The spec sheet lists one standard active brush, and the page highlights “Powerful active scrubbing of your pool surface.”
- Filter access from the top. Maytronics describes an “Easy-access, top load fine filtration basket” and lists filter access as “Top Access.”
- A simple routine. The default cycle is 2 hours, per the maker, and the listing calls the system plug-and-play, with a clean pool promised in that same 2 hours.
What Could Be Better
- A 33 ft length limit. Long rectangles and many family-size pools run past it.
- No waterline scrubbing. Maytronics answers “No” on that line of the spec sheet.
- No way to schedule it. The maker lists no weekly timer, no delay feature, no app, and no remote control.
- No anti-tangling swivel. The maker’s own comparison table shows “No” for the DX3 and “Yes” for the larger Proteus DX4 and DX5i.
- One filter grade in the box. The fine filter kit is standard, the “Additional Filter in the Box” cell is empty, and there is no full filter indicator.
- A spec mismatch on controls. The Amazon spec table lists the control method as “Remote,” while Maytronics lists remote control as “No.” Plan around the maker’s answer.
Pool Fit: Length, Shape, and Pool Type
Measure the long side of your pool before anything else. Maytronics caps the DX3 at 33 ft, and the Amazon title repeats that figure, so on this point the sources agree. A 14 x 28 ft or 16 x 32 ft rectangle comes in under the limit. An 18 x 36 ft pool does not, and neither does a 20 x 40 ft one; owners of those pools should look at a model rated for a longer pool rather than hope the DX3 stretches.
Shape is the second check. The maker lists rectangular and round pools. Kidney, freeform, and L-shaped pools are not on that list, so if yours is one of them, ask Maytronics before you buy. The listing describes the robot as climbing walls “on any pool surface, no matter the shape or surface type,” which is a broader claim than the maker’s spec line makes.
Pool type is where the two sources part ways. Maytronics classifies the DX3 for “In ground and Above Ground” pools, while the Amazon title calls it “Ideal for In-ground Pools.” If you own an above ground pool, the maker’s classification is the one to rely on, and the manual or Maytronics can tell you whether your wall type and depth need anything special.
Cleaning Coverage, Brush, and Suction
The DX3 covers two surfaces. Its spec sheet reads “Floor and Walls” for coverage and “No” for waterline scrubbing, and the page’s first highlight is “Scrubs your pool floor and walls.” The tile band at the water’s surface is not on the robot’s list.
Maytronics lists one standard brush, marked active, and a suction rate of 4,000 gph. Its highlights also say the robot “Intelligently navigates your pool with CleverClean™.” The spec sheet answers “No” to enhanced cleaning cycles, so the 2-hour default cycle is the one program you get.
Filter Access and Weekly Care
Debris collects in the robot’s own filter basket, and the spec sheet lists filter access as “Top Access.” The box includes the fine filter kit only. On the DX3 page, Maytronics shows ultra-fine debris filter baskets and panels in its add-on accessories, so a finer filter is something you buy separately; confirm with Maytronics that a given part fits the DX3 before ordering.
The DX3 has no full filter indicator, according to the spec sheet, so you will not get a signal when the basket needs emptying. The listing’s care field offers little help, reading only “General cleaning and maintenance as needed.” The manual is where any cleaning interval for the basket would be. A search for this product number on Maytronics’ manual portal came back empty when we looked, so ask the seller or Maytronics for a copy if one is not in the box.
Maytronics lists the DX3 at 14.796 lb, less than the 20.9 lb it gives for the Nautilus CC Plus compared below.
Corded Power and Electrical Setup
The electrical rating is not stated on Maytronics’ US page for the DX3. The Amazon listing has two spec fields that touch on power: “AC/DC” for the power source and “18 volts” for voltage. Neither field says what part of the system it describes, so neither is a substitute for the rating on the power supply label or in the manual.
Ask Maytronics, or check the manual, for the rating and any setup requirements before you buy. Follow the manufacturer’s manual for installation and use, and have pool electrical work done by a licensed electrician.
One cord detail is clear from the maker: the DX3 does not have an anti-tangling swivel, while Maytronics lists one for the Nautilus CC Plus and for the Proteus DX4 and DX5i. If a cord-handling feature matters to you, that is a reason to compare models before buying.
Warranty and Where It Is Sold
Maytronics gives the DX3 a two-year warranty on its US product page. That page’s Buy On Amazon button links to this same Amazon listing, which helps confirm that the listing carries the model Maytronics sells in the US. When we checked, the seller on the listing was Pool Supply World, a marketplace seller rather than Amazon.com itself. We did not find published Maytronics US warranty terms that say whether a purchase from a particular online seller qualifies for service, so ask Maytronics or the seller before you order, and keep the receipt and serial number together. Maytronics runs a separate warranty registration site linked from its US support menu.
How It Compares
Here is how the DX3 lines up against two other robots, one corded and one cordless. The first comparison uses Maytronics’ own pages for both models; the second uses the Aiper listing.
Proteus DX3 vs Dolphin Nautilus CC Plus
Between these two corded Dolphins, the choice comes down to pool length against warranty. The Nautilus CC Plus page lists 40 ft in its comparison table and up to 50 ft in its tech specs, an anti-tangling swivel, and an ultra-fine filter kit in the box, but only a one-year warranty and a weight of 20.9 lb. The DX3 stops at 33 ft and has neither the swivel nor the second filter, yet it carries two years of coverage and weighs about 6 lb less. Both list floor and wall coverage, no waterline scrubbing, and no app. If your pool is longer than 33 ft, the Nautilus CC Plus is the Dolphin of the two that the maker rates for it.
Proteus DX3 vs Aiper Scuba S3
The Scuba S3 is the pick to consider if the tile line and scheduling matter more than wall coverage. Its listing describes a sideways waterline pass that climbs 2 inches past the water’s edge, weekly cleaning plans set in an app, an alert to your phone when the robot surfaces after a cycle, and a 180-micron mesh plus a 3-micron insert. It runs on a battery, rated up to 240 minutes in Eco mode, and the listing gives its weight as 18 lb and its warranty as two years. What its listing leaves out is wall cleaning: the features cover the floor and the waterline. The DX3 is the opposite trade, scrubbing walls with no charging, but leaving the waterline and the scheduling to you.
Who Should Look Elsewhere
- Owners of pools longer than 33 ft, the maker’s limit for this model.
- Owners of kidney, freeform, or other shapes outside the rectangular and round shapes Maytronics lists, unless Maytronics confirms the fit.
- Anyone who wants the waterline scrubbed by the robot.
- Owners who want the robot to run on a timer, start on a delay, or report to a phone.
- Buyers who want a finer filter included rather than bought separately.
- Buyers who have not checked the power requirements with Maytronics or in the manual.
Why You Should Trust Us
We did not put a DX3 in a pool. What you read here comes from sources we opened and checked line by line: Maytronics’ US spec sheet for product number 99996114-LSB, the matching Amazon listing, and its owner ratings. The BackyardPoolLab Score on the card begins with a base calculated from the owner rating, then adds an editorial adjustment that can move it by no more than half a point in either direction; for the DX3 that adjustment reflects a mismatch between the Amazon spec table, which lists the control method as “Remote,” and Maytronics, which lists remote control as “No.” Our How We Review page lays out the full method. Commissions play no part in what we say about a product or in its score.
Final Verdict on the Dolphin Proteus DX3 Automatic Robotic Pool Vacuum Cleaner
The DX3 does a narrow job and says so plainly: floor and wall scrubbing with one active brush, a 2-hour cycle, a top-access fine filter, a light 14.8 lb body, and a two-year warranty, per Maytronics. It gives up waterline scrubbing, scheduling, a second filter grade, and a cord swivel, and the maker rates it for pools no longer than 33 ft. If your rectangular or round pool is inside that length and you are happy to start each cycle yourself, it covers the basics. If your pool is longer, or the tile line is the chore you want gone, compare the two robots above or browse our robotic pool cleaners section.
Frequently Asked Questions
What size pool can the Dolphin Proteus DX3 clean?
Maytronics rates it for pools up to 33 ft long, in rectangular and round shapes. The Amazon title gives the same 33 ft figure.
Does the Proteus DX3 scrub the waterline?
No. Its US spec sheet lists coverage as “Floor and Walls” and waterline scrubbing as “No.”
Will the Proteus DX3 work in an above ground pool?
The maker’s pool classification reads “In ground and Above Ground,” though the Amazon title mentions only in-ground pools. Check the manual or ask Maytronics about your pool’s wall type before the first run.
Does the Proteus DX3 have a timer, an app, or a remote?
None of them, per Maytronics: weekly timer, delay feature, mobile app, and remote control are all listed as “No.” The Amazon spec table lists the control method as “Remote,” which does not match the maker’s spec sheet.
How long does a Proteus DX3 cleaning cycle take?
The maker lists a default cycle time of 2 hours, and the listing also mentions 2 hours. The spec sheet shows no enhanced cleaning cycles.
What electrical rating does the Proteus DX3 need?
It is not stated on Maytronics’ US page, and the listing’s “AC/DC” and “18 volts” fields do not answer it. Ask Maytronics or check the manual for it. Follow the manufacturer’s manual for installation and use, and have pool electrical work done by a licensed electrician.
About the author
Brett Beck is the editor-in-chief of BackyardPoolLab. He leads our coverage of robotic and manual pool cleaners and oversees our editorial standards. Brett builds each guide from manufacturer manuals, product specifications and public safety guidance, and checks that every claim traces back to a source.